The one thing we've been told about 10.14 is that it will not run 32-bit apps "without compromise." The first "compromise", that makes sense to me, is to finally stick a fork in Carbon. This has done its job (the transition from the "Classic" Mac OS), and has been deprecated for years. With this in mind, I'm guessing that my 5,1 cheese grater will still be supported, and I'll just have to use an old machine, or boot from another volume with a legacy system, if I can't live without the one Carbon app I still use regularly.