I switched from Qwerty (40wpm) to workman (80wpm after a year) but ultimately I returned to Qwerty and now I'm again on 50wpm. It's not good at all and feels stupid compared to workman but I don't want to type using my two index fingers when I'm using systems other than my own. It felt stupid that I had to type using my two fingers with less than 20wpm speed whenever I was typing on someone else's machine. Only solution seems to be learning two keyboard at the same time but now I think I have already forgotten workman (When I returned to Qwerty I could only type with 20wpm speed while my previous speed was well above 40)