Bo Peng wrote:
lyx file get 'corrupted' soon
I used SWP in the mid-1990s. I had to stop because it kept inserting unknown binary characters in my .tex files that made them not compile on other machines (as when I would email the files to co-authors). I have not seen lyx do that, or introduce "corruptions" in the files, although it could do something similar if you define "corruption" to be a result of incorrect entry by novice users. Presumably SWP is no longer plagued by that old file corruption problem, but they've lost me as a user.
Dimitrios Diamantaras