JS numbers behave much more like C's definition of signed overflow being UB as it's signed numbers are effectively like 51-ish bit with a SEPARATE sign bit and non-assiciative behavior when overflow happens.

> No big endian system will ever be popular again

Cries in 68k nostalgia

> It's time for big endian to be consigned to the dustbin of history.

And, especially what most people call big-endian, which is a bastardized mixed-endian mess of most significant byte is zero, while least significant bit is likewise zero.