problems with source written with x86 in mind).
I like MIPS, it's a really nice architecture. But it hasn't really progressed a lot since the 64bit R4000 was introduced 20 years ago.
A bit beefier FPU (or ARM-style NEON/VFP units; MIPS-3D never really caught traction), a new release of
the MIPS32/MIPS64 spec with cruft removed and modern features added (no more optional features) and of
course more love for the entire toolchain: it's lagging behind ARM feature-wise and at least GCC no longer considers MIPS important
and therefore only receives attention from some interested third parties, the ABI is known to be a bit cumbersome.