Why? The article doesn’t really help.
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
But why? How is that useful for users? Why not make the switch when the hardware exists?
It’s preparation for 26.04 and it’s a lot of work to maintain support for the older hardware that’s not very popular. Optimizing developer resources towards what should be the first RISC-V hardware to try and get mainstream adoption
That makes sense.