I’m relatively new to using Matrix, so far I’ve given Element and Fluffy Chat a try. I’ve preferred Fluffy Chat so far, I dunno it kinda just seems more reliable and I like the mobile app, but I was wondering if there’s any others that are worth checking out. I mainly use Linux, Windows, and iOS.
I hope Element X will get support for spaces soon. I agree that fluffy does seem to be the most capable at the moment but I don’t think it has support for sliding sync.
SchildiNext (the Element X fork) already supports filtering rooms by spaces (as a lab option: menu > Misc > Space navigation), if that’s what you mean.