> The same way Apple handles a PowerPC-compiled application from 1998. It doesn't handle them at all. There was a transition mechanism, to get users updated, b

> The same way Apple handles a PowerPC-compiled application from 1998. It doesn't handle them at all. There was a transition mechanism, to get users updated, but it wasn't maintained long term. You could not run PowerPC binaries from 1998 in 2005. Apple expected their users to update the binaries for new architecture in the long term. In many cases, not only ISA and ABI changed, APIs too; good luck if your application used Quickdraw. (Yes, I still do have coasters in the basement). So compared to that, Wayland's Xwayland is too nice and too longterm.