> it doesn't work at all with everything that uses video acceleration (like a modern browser, and as a corollary all Electron applications).

Works for me. 15 years ago it was a bit more problematic, but worked still.

> works even on modest connections (like a 20mbit/s ADSL)

This is not modest by any means. Vnc works good on 56 kbit, and marginally at 24kbit.