I guess it sounds like you're looking for an alternative technology? but in case you haven't seen them, these folks make them - https://www.daliborfarny.com/
I've worked with vacuum tubes a bit in audio amplifiers, but this seems wild, honestly. Does anyone know how Nixie tubes can manage such a feat? 100,000 times a second? It's incredible.
I don't know how fast they can switch on and off though, for the purposes of something like the above. Don't particularly trust the internet on this one because switching speed isn't really the diode part (which would be very fast), but rather the emitted light...which I assume lags a bit at "off".