Addressed towards the end of the post:

"Why not Linux or Windows? Gotta start somewhere! If the reception is positive, we’ll work hard to add further support."

As you can see from the commit log, we have 3 people working on this. So we're quite limited in what we can take on. That said, our belief holds and we'd love to support Linux and Windows.

I had "MacOS" in my original title, but HN limits titles to 80 characters!