E-bike owners, any regrets with your choice/hindsight

If I didn’t find myself bending rear mechs every couple of months, I’d consider AXS.

As it is, I’ve resigned myself to Deore from now on because XTs were becoming an expensive habit. I think I’d cry if I wrecked a £300 derailleur.

Can you get spares? Cages etc?

Yes you can. Ratio Technology  also do cages.