Because Ubuntu is only supporting RISC-V chips that meat RVA23 standards. There’s no consumer hardware out there yet released. RVA23 compliant hardware is supposed to be the big jump to be a solid alternative to ARM and x86 consumer hardware so that’s what they want to support that going forward rather than the older more dev/experimental hardware that they’ll still support on 24.04
Because Ubuntu is only supporting RISC-V chips that meat RVA23 standards. There’s no consumer hardware out there yet released. RVA23 compliant hardware is supposed to be the big jump to be a solid alternative to ARM and x86 consumer hardware so that’s what they want to support that going forward rather than the older more dev/experimental hardware that they’ll still support on 24.04