Thanks both for your advice. That’s good enough for me, I will take the plunge to High Sierra shortly. While there are a few “TBAs†to be wary of, I’m pretty sure CCC and Diskwarrior will eventually put APFS to bed and these are really the only utilities I rely on. Let’s hope that Apple implements TM conversion while maintaining the integrity of existing (or at least recent) HFS+ backups.
Apologies for my spelling of Mojave - was that your typo edit joemikeb?! Australians are usually phonetically driven
Andy
