I have recently set up my own Matrix server. I have played around with the screen sharing, and it appears to work quite well. Very high quality.
This may be because my server is very small and few people were using it. I haven't played around with it on larger servers.
I find that using AI can sometimes help me get the ball rolling. Rather than having a blank page, I have some (sometimes shitty) code that I can start from. I have never used 100% of generated code in production.