I think this expectation doesn't vibe with my understanding of how people used to think about embedded or consoles. You shipped them and they were done. The games industry was also often trying to ship quickly. Small teams too. Latest tweaks to memcpy or fine tuning or revisiting the finer points of an already adequate SDK is low priority.
By contrast, many more people are updating optimizations to GCC or clang for arm, more frequently and over a longer timeframe.
You're probably right about consoles, and I was surprised to be wrong, but I checked, just to be sure.
GCC and Clang are very nice compilers, but they are a different thing than the std lib. glibc, musl, the Windows C Runtime, iOS, Android, all have different implementations, sometimes outdated.
By contrast, many more people are updating optimizations to GCC or clang for arm, more frequently and over a longer timeframe.