I appear to be using an unsupported configuration (oops). The good news is that I haven't seen any problems, not that I'm encouraging anyone to follow in my footsteps.
Looking for suggestions on how best to extract myself from this situation...
Switching to a different theme would be disruptive and I'd rather sit tight until the next Adaptable comes along. Or am I sitting on a time-bomb?
Does anyone know if a compatible Adaptable will be out before Moodle 3.11 (Q2)?