It is just too new. Remember unprivileged ISA was 20191213 and privileged ISA was 20211203. This is mere months ago. We get some micro-controller families ear

It is just too new. Remember unprivileged ISA was 20191213 and privileged ISA was 20211203. This is mere months ago. We get some micro-controller families early, and the companies behind them do commit to some level of long term part availability. Recent code density work (Zc etc) enables higher code density than Thumb2, finally making RISC-V the most dense in 32bit too. Furthermore, there's standardization going on for simpler and more complex interrupt controllers, for ISA profiles, and for platforms (e.g. profiles on hardware that's expected to be there), which will make long term part availability less important, by maximizing re-usability across hardware. These early hiccups shouldn't discourage anyone with an ISA this new; Effort is being put into the right places.