Yeah I’d assumed that after reading the documentation hence the “dumb question” comment in my post, but thanks for confirming - I didn’t want to make a massive set of changes based on my reading comprehension alone.
I should be able to workaround keeping the previous object id (e.g. sensor.wan in my example) which prevents me redoing some composite sensors, automation references etc. with some judicious titling and tooltipping in Lovelace.