https://techcrunch.com/2023/07/13/cowboy-rides-to-the-rescue-of-vanmoof-owners-with-app-to-unlock-threatened-bikes/

Since struggling e-bike startup VanMoof confirmed it had gone into the Dutch version of administration, there has been a question hanging over the VanMoof bikes out there in the wild. These bikes relied heavily on a connected smartphone app made by the company. The app controlled a number of important settings and functions, not the least of which was actually allowing the bike to start (although there are two non-app options).

If VanMoof servers go offline during their administration, VanMoof riders will be left with a less than satisfactory e-bike, which barely works without its software “key.”