Please vrc team do not unplug the support of avatars 2.0, the sdk is not available anymore on the website but there's still tons of avatars/worlds out there that still uses it.

I started playing in 2017 and most aspects of this game have been drastically improved with time, the overall optimization, the worlds content and quality, the safety options and even the avatars themselves are more and more impressive with each year, but sdk 3.0 was something a pet peeve of mine and here's why: It looks like it was made just thinking about full body tracking, there are a few implementations that are cool like the inventory toggle so you can even have different outfits on a single avatar, but the legs always look awful if you are not using full body, whenever you crouch or just play in sitting mode, your avatar looks like is crawling with the legs behind, instead of the usual squat. The legs always stay super closed to each other even while standing and sometimes just crosses each other clipping one another. Even the option to untoggle expressions look like something made just for the Index because toggle animations happen wildly with that headset.

Before someone points out "you just don't know how to work with avatars" I do agree that I'm nowhere near a pro creator, maybe not even a mid tier at best, but I have been working with avatar creating in both unity and blender for a while and that issue with the legs is something that has eluded me and my waaay more talented friends I have since its implementation. That's why I just sticked with 2.0 until now... Maybe there is something that can be done in either blender or unity but so far it looks like the issue is with the rigging inplemented in the sdk 3.0