Edit:
It seems to have been proven in court that they have copyright (rather than the old patent) of the design. A bit like the coke bottle design I suppose.
https://www.farrer.co.uk/news-and-insights/brompton-puts-the...
(Brompton is a UK company, so this wouldn't apply to UK-based competitors, but it would protect US-based competitors.)
EDIT: it looks like the EU actually has similar rules. Brompton is very likely going to lose this case, and is probably just counting on the court proceedings to delay this competitor's entry into the market. Expect a flood of Brompton-likes when the lawsuit settles.
If there is a downside that would be that even though the wheels are quite a bit bigger than the ones of the bike showcased here that the tires are very high pressure and need frequent topping up.
Do you use CC0 for all your own work?