JS converts most number into 31-bit ints internally (which is why it’s so fast). GUI work often prefers int or f32.

You have a point about games, but the CPU is seldom the limiting factor.

Very few people are handling raw audio. For the rest, codec hardware beats everything else by a massive margin.

Being good at floats matters, but even float-heavy code generally has way more integers than floats making integer performance king.