Here's my hc somewhat aged up Danny - he's eternally exhausted, cantankerous, and would really like to stop needing to pry ecto-experiments away from evil billionaires.
He still had the original suit until somewhere in his teens where he got too cocky, got nabbed, and [insert fandom-typical vivisection here.] Now he's traumatized and his walls are up and rock solid (he's crumbling on caffeine, spite, and love for his friends)
Alternately, the vivisection-tape design gets added in after the Batfam rescue him from his parents/GIW (which is why there are lil triangles <3 right where the bat wings usually are!) I could probably do a version with a nightingale instead of his logo (who needs a logo, anyway...)
As he gets older, he definitely fills out - so we have a stronger jaw, broader shoulders, large hands and feet - I think his rate of ageing is somewhat slowed down - but by the time he's 40 I think he'll definitely be broad and heavy set, like his dad (which in more realistic proportions, I think like Wilson Fisk yanno?)
This is also kind of a Hazmat AU where the Fentons take lab safety as seriously as they can for two independently employed, neurodivergent parents with a hope operation - Maddie and Jack still like to double-check the seals on his hazmat whenever given the chance. The ecto-tape is normally black, but glows green when it absorbs ecto above the recommended safety levels. (It also acts as a secondary protection, continuing to draw in the energy and convert what excess it can into light.) I suppose this means that Danny could use it as a limiter, removing excess tape when he needs to go all-out... but I think he prefers to keep as much of his hazmat suit on as possible.