Not hating on open source, just let people use what fits their expectations and needs and stop deterring them with gatekeeping :P
UX = user experience
I use sync, but I think they still should be FOSS, or at least open source. Just because when anything gets left behind or never fixed, you can take it and patch it up yourself. That includes clients too, lots of good clients that get left behind because Dev stopped and whatever they were interfacing with changed.