But no real room to work on them is still the problem.
With open wheel arches then it is possible, but with my Milan it’s just not doable.
I know of one Strada with discs, no other velomobilist that I know took that decision.
I started with 70mm drums but had a few too many brown trouser moments so am now on 90mm. They can get hot though as there is no cooling. Some people have a pipe to drip water onto them for cooling purposes, but these people don’t live in the Rhine flatlands like me!