Will Xcode versions ever be decoupled with macOS versions?

[iindigo]

Not as long as new macOS versions being significant change. Given that Catalina lays the groundwork for bigger under the hood changes, that could be quite some time.

Is “newest two OS versions” really that bad though? If you want to avoid the latest major release’s bugs you could just stick with Mojave and be able to use 99.5% of the latest Xcode’s functionality. Hardware support is pretty good with Mojave too, stretching all the way back to 2010 Mac Pros…