I'm in the same boat. The UE dev workflow is the first issue, but there's also the surrounding ecosystem for me like the Epic launcher, Substance, Bridge, Mixer and Affinity that I don't want to have to replace and also don't have time to fiddle with if they don't work 100%.

My experience moving away from the happy path by doing UE dev on a Mac a few years ago was so painful I have a hard time believing the linux experience is going to be a net win. Unless you're using the same tools as Epic, shit just seems to break a lot.