This is my : "can we talk about the Dawn of the quirks era? I'm dying to talk about the Dawn of the quirks era"moment so let's take a look at the technological design that the world went through after it
Now, this is a detail that twitter user nakamafor made a thread about but basically the place being bombed by AFO followers in chp 193 have a strong resemblance with a Research and Development Lab located in Tokyo(after trying to take a closer look I noticed it's the Koatsu Lab or so it seems)
So it seems like the rebels 2nd was leading had some allies, heck maybe even some members, helping them develop their own support itens and guns which bring us to the gaunlets 2nd is using:
Those are quite lean and well designed aren't they? It works pretty nicely for his quirk which considering the context of this era and the feelings people had regarding meta powers/quirks it's a quite an achievement for support itens
Now let's compare with the support itens All Might used
Hech the itens Power Loader is using and the ones Yoroi Musha used prove what All Might said regarding the technology on supporting itens. Bulky and otherwise
Now if we also take a look at the technology available for common civilians the most they got for cutting edge technology is...some hollograms.
They are still using normal cellphones and cars even though we had seen a few pro heroes using flying cars in the background. Uraraka even uses a flip phone :')
I am just going through all of this rambling to say: bro the technology straight up stagnated and the level of scientific and engineering development the rebels had available for them is only getting a comeback now and even then it's restricted for heroics so it doesn't reflect how into the future the events taking place truly are
OH AND DON'T EVEN GET ME STARTED ON ALL THE ROBOTS AND STUFF GOING ON IN UA or i will ramble even more :')