Indeed, but this also means that you would get drastically different performance on platforms that have more physical registers vs on platforms that have less. For example x86_64 only has 16 GP registers, while AArch64 has 32 - if you use 25 registers without any analysis and just go to stack with 10 of them, the difference could be huge.
But... I consider SLJIT to be for a different use-case than AsmJit. It's more portable, but its scope is much more limited.
