Is Garry's Mod getting old?

I guess it's safe to say that GMod is already old, but that it has aged nicely, like many Valve games, no matter how many time passes, it still feels nice and fun to play, if the game didn't evolve with time, which it did, the addons surely did, and it shows,

Some TFA Weapon addons feel like they came out of a triple A game from this year, its insane how good the quality of some of those addons are.