The very limited software support would probably stop me from buying one. Even if there are builds or container images for riscv64, they are probably often not

The very limited software support would probably stop me from buying one. Even if there are builds or container images for riscv64, they are probably often not tested at all. Sometimes different architectures have weird quirks (unexpected performance issues for some code, unexpected crashes). I guess only very few maintainers will investigate and fix those. It took quite some time until all software worked perfectly on arm/arm64. When the first Raspberry Pi was released, this was quite a different experience.