Optimization is not as simple as it was in 2018-2020 since the introduction of Avatar 3.0 and Avatar Dynamics which means people have a ton more shit on their avatar. Sure you can atlas and all that (which in all honesty causes issues if you plan to do cool stuff with your avatar. 1 texture 1 material simply doesn't cut it anymore with the amount of extra shit avatars have now), but even if everyone atlassed and was 1 texture 1 material your frames would not improve that much.