London’s DLR is a gadgetbahn. For all its obvious limitations it’s been quite successful. Lots of new stations, lots of expansions, decent integration with traditional rail. VLR would work similarly.
>something that claims to be innovative but in fact doesn't do anything not thought of before and doesn't solve any problems
The DLR was I think about the first decent scale autonomous rail system and provides a lot of transport.
I mean things like https://en.wikipedia.org/wiki/Morgantown_Personal_Rapid_Tran... predated it by a decade but is dinky in comparison.