This would’ve been great 15y ago, but today they all want help on their phone and there’s no good way of doing that.

Oh, that's tempting. Is there vanilla openwrt or any other all-FOSS firmware for it? I'm rather paranoid about this kind of appliance.

How does it compare to the PiKVM?

Much less expensive (barring diy and print-a-case-yourself), and most importantly to certain people, easily available in the US from Amazon. (Jetkvm also suffers from unclear import costs and delays)