There's definitely some aspects of them that haven't aged very well, but on the whole I agree. I can go back to pretty much any random highlight video from 2013 and find it just as enjoyable as a highlight video from this year, if not more so. I'd argue that there are some editing choices that have aged particularly poorly, though. Joel is a great editor and I think most of his choices hold up well, with the exception of some very 2012 meme inserts here and there, but you can really tell when Vinny made an editing decision because it's almost always the wrong one. For instance, I'm certain he was the one who had the idea for
these god awful (and mercifully short lived) Adult Swim-style bumpers.
I definitely find Vinny less funny nowadays as I really think some of the newer memez ("speen" especially) feel much more forced than the (comparatively) more natural ones of the past, but he still has his really good moments. Conversely, I think Joel has just all around improved, since we get a sense of humor that's (mostly) the same, but with his teenage obnoxiousness scaled WAY back. His recent Halloween streams are definitely some of my favorites he's ever done.