I understand the overhead is not something any dev looks forward to, but I've also seen teams of one successfuly supporting their games on multiple platforms. As they say, where there's a will, there's a way.
Another point to keep in mind is that we, the Linux users, are still mostly being treated as second-class citizens at best (which is not to be confused with normalizing such behavior), so any form of support is surely better than none.
Too bad to hear you switching sides though. If you still have the knack for it, maybe check out the current state, a lot has changed over the past few years.