WebBluetooth, WebUSB, WebSerial and the File System Access API aren’t universally available in Browsers for example.

Tauri would be a lesser evil compared to electron, but that then involves libwebkitgtk.

AFAIK Contabo seems to oversubscribes harder than others, so Performance can be really bad, high CPU steal, low IOPS, etc. It varies from instance to instance, as usual, sometimes support can move you to a different node but many people seem to prefer other providers after having used contabo.