Yep, it's a popular answer. It also makes quite a bit of sense for two reasons. Steem is pretty close to perfect and everyone uses that. So it's kind of unlikely anyone remembers or is willing to try what you want. Secondly hatari is being actively developed, is based on the winston sources and it emulates a lot more things. I believe it makes more sense to work from hatari sources than winston's. Also a good idea for something to work on is hatari's gui.