Hey @Tim_Woodward!
There might be a bit of a misunderstanding here. I want to clarify that you’re not required to use ARC, mate. If you don’t have a need for it, no problem.
Simply follow Danny’s instructions to enter a single 0 in the manual port forwarding window in Settings>Roon ARC and you should be good.
All of your other devices appear to be perfectly compatible with Roon 2.0. Maybe take a peak at 2.0 and see what you think. You can easily hop back over to 1.8 if you like. We’re happy to help with that if you need it. Just a thought.
Perhaps it won’t. A staggering amount of dev time and testing was put into 2.0 before release. This was a huge undertaking and things really do seem to be going well for most of our customers. No pressure of course, the choice is yours to make.