That argument is tantamount to saying that the EDM genre has stagnated since the 90s after your above listed musical instruments were released.
Hi, I'm not literally suggesting those are the only important instruments. People sometimes truncate examples in suggestions. The assumption is that if someone likes the idea, they could extend the pattern.
Yeah I would find this more interesting than the current tags e.g. IDM which is such a nonsense/confusing term anyway.
Not sure if Musique Concrete on one side or Venetian Snares on the other used those instruments.
edit: it's a nice website though.