A look at LyX 2.0

I've been using LyX over a decade too and it's indeed great. I've never lost any text I've edited with it, I can convert it to different formats, and text can be easily split into different chapters that are their own documents (with common parts like bibliography).

Some things in previous versions of LyX have been a bit awkward to use e.g. when you have a small screen and are editing a large table, but hopefully also those things work better nowadays.