Park and Sparkbite ala Earthspark universe! I love the connection glove that lets Robby and Mo feel what the other Terrans are feeling and I want to make that BODY HORROR, so what if that glove just kept growing? Well Park is finding out.

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Park and Sparkbite ala Earthspark universe! I love the connection glove that lets Robby and Mo feel what the other Terrans are feeling and I want to make that BODY HORROR, so what if that glove just kept growing? Well Park is finding out.
Hi vector prime! I have a question which I’ve been dying to know, how do transformers age? I’m asking this because some transformers look like old men, for example, revenge of the fallen jetfire has a cane and a beard and alpha trion also has a beard and some transformers look like kids too, for example, wheelie and those kids that were shown on the planet that unicron gobbled up. I hope there is an answer to this transformers age thing, thanks vector.
Dear Mature Matcher,
Well, I like to think I've aged gracefully, ha!
In truth, you ask a good question, though I think your lived experience as a human has colored your perspective. We do not age as humans do, but our bodies are still subject to wear and tear. Our fuel lines erode and leak, our gears grind and slip, our belts become brittle, our joints seize. We discolor, our paint scratches off, decals peel free, chrome flakes away. Stress marks line our faces and hinges. We rust. Our minds are prone to different kinds of degeneration, as newer memories overwrite older ones, or as unhealthy feedback loops develop into rampancy. But few of these processes are fatal, and fewer still are irreversible, so long as we take the occasional tune-up to replace parts as they fail.
The physical traits you observe aren't directly tied to the process of aging. With the usual caveat that not all Transformers are the same, even within a single universe… it tends to be that, once we are protoformed or built, the only time our bodies naturally change is when we take on a new form. Now, you may not realize this, as we still must appear very alien to you—but on Earth, this might involve changing our appearance in robot form, too, mimicking physical traits that we identify with, the better to be understood by your kind; this is sometimes called "humanizer" technology. Don't be too quick to judge based on appearance, though, as sometimes what you perceive as a mustache might simply be a coincidental arrangement of kibble!
Otherwise, our bodies only change in the course of upgrades. After choosing our first alt-form, we may undergo procedures to bring us up to "full size", speaking either culturally or biologically. There are universes where our sparks grow continuously through our lifetimes, demanding periodic upgrades to match, with the bodies of the biggest and oldest Transformers practically being extensions of the planet—but those are extreme cases, and it's usually not a necessity. You mention Wheelie, who had something of an arrested development while marooned on Quintessa, and although there exist divergent timelines where he did get a larger body, he's usually comfortable with his stature; many Transformers take pride in being "Minibots" and may even make the conscious decision to downsize.
In the modern age, there is certainly an association between youth and a diminutive frame, as Micromasters, Mini-Cons and Protoformers join our society. The fact is that Transformers nowadays are smaller than they used to be, because fuel is more scarce. There have been many such paradigm shifts in the construction of Transformers: generations are usually demarcated by broad design trends, major technological advancements, and shared aesthetic sensibilities. When it comes to these fashions, there are some classics that anyone can recognise—facial adornments, oversized chins, and non-visible olfactory sensors are all characteristic of different points in history, and give a clue for how old we might be. You know, the oldest Transformers predate the introduction of the ball-and-socket joints which are so ubiquitous in Earth life; I myself have not one in my body!
The multiverse being as strange and wondrous as it is, there are plenty more esoteric reasons behind these physical changes. Famously, the Matrix of Leadership is known to induce a metamorphosis in its bearers to better accommodate the collective wisdom of Primes past. Exotic kinds of Energon have been known to possess transformative properties. For reasons yet unknown to my Transtech friends, exposure to negative-polarity particles correlates strongly with facial structures resembling human goatees.
Some believe that we once lived mortal lives, aging as most other species throughout the galaxy do, only for that mortality to have been taken from us in our race's infancy—through the interference of Quintessons, or the defeat of Mortilus, spoken of in myth as death incarnate.