Yes, I've updated. Only one issue so far. You may wonder why you can no longer mount any external drives. Finder just doesn't see them. Turns out that anyone running ESET virus protection will find that ESET has enabled device protection which will stop any external drives being mounted. You have to go into ESET and uncheck that option - ESET Cyber Security (from the main menu bar)>Settings>Device Control>Rules.
Then it all works fine again. I see now that it actually blocks any devices so that may be why Russell's Wacom has stopped working, or may be not if the new one is working.