Late to the mini velo party!

Moulton’s are fun to ride, I have had most models at some point (no new series). The thing is for a bike that claims to be mechanical superiority they’ve had nothing but issues. Quoting myself here but this is a list of things I could think of a few years back.

APB suspension is too low, can lead to seat tube collapsing.
Series 1 rear forks not being strong enough and cracking.
Early series 1 front forks where not brazed correctly. It is common for the steerer to detach from the forks while riding where the brass hasn't fully flowed.
Paint on new models come of if you sneeze near them.
Moulton TSRs didn't have bump stops large enough at some point (don't know years that where effected), this meant that the forks banged into the leading link plates damaging the forks. This happened to me and Moulton refused to warranty them until I threatened legal action. IMO the damage that happened to my forks and them knowing it was a design fault that could lead to sudden failuer should result in complete recall and replacement.
Stainless steel New series rusting through.
£500 stems that go rusty in a year
Faulty rear flexitor on New Series that was leant to Bicycle Quarterly and ended up with a bad review. Moulton only fixed on proviso that the owner wouldn't lend out for review again...
Rear suspension on pivot on TSR is a faulty design. Is fixed on the SST still selling the TSR.
Early AM fork where too weak so they changed the design so there wasn't any taper.
Bridgestone Moulton rear forks can break at the pivot. I guess this is because the aluminium can't take the flex.