I'm really praying for sustained first class support of Linux (both game and editor), but I wonder what "It's our intention for s&box to be cross-platform" may extend to.
Totally understand one step at a time, and probably no one wants to commit to anything yet, though it would be really nice in the long term to see support for even more platforms. I wonder if macOS (modern Apple Sillicon Macs) would ever be on the cards? I know that may be technically far fetched though, and probably not much point with the game's current state of performance.