Agreed. There appears to be some degree of improvement with the viewport vertex issue addressed but for me there is still a little amount of crashing while triggering deformers and animating. Might have something to do with the fact that my rig is not as optimized as it should be. I'm in the process of optimizing my rig and will see if I still experience crashes after.
As far as crashing during modeling, I can't contribute to that because I have not done any Maya modeling in months.
As far as Xgen is concerned, I have an Xgen file that eventually started taking 10 minutes to open in Maya 2022.
https://www.youtube.com/watch?v=2tl8ThXPi-Q&ab_channel=KoteyAnnan
it was an Iberian Lynx with about 10 descriptions. That 10 minute file opening wait time made me give up on Xgen. I'm going try it in 2024 to see if that issue still exists and if there are new issues as you described.
UPDATE: 7/31/2024
I figured out why some of my XGEN files are taking 10 minutes to load. it's because I'm using curves to create and control my IGS guides. This was something I preferred because I felt more comfortable using maya curves to determine the direction of my fur (I was not really liking how the IGS guides and/or groom were responding to the grooming brushes). molding curve cv points was just easier for me.
For all my XGEN files that don't rely on curves, there is no 10 minute wait time. So it's looking like XGEN does not like having to create the relationship between maya curves and IGS guides at load time. Anyways, this means I'm discarding the use of curves in my future projects until the issue is resolved. Other things I might need to check is if the curves have history or if all I need to do is disconnect the curves from the guides once the guides are doing what they are supposed to. I will update any further findings in this thread or a new one related to XGEN.