That exists via sysconf(_SC_PAGESIZE). The problem is that hard coding the page size to 4k has worked just fine for much of the software written in the last few

That exists via sysconf(_SC_PAGESIZE). The problem is that hard coding the page size to 4k has worked just fine for much of the software written in the last few decades, which means that the 4k size has ossified to some extent (Hyrum’s Law).