As far as I can tell there's been no communication from him for several months and not since he posted saying he'd turn kbin.social over to a new admin.
But the domain for kbin.social was recently renewed (I posted full details over at https://fedia.io/m/fediverse/t/1403334/Any-updates-on-kbin-social-recently ) which gives me hope that ernest is still around, just a bit more behind the scenes.
Of course, it could also be that the domain was simply auto-renewed (as described in https://www.godaddy.com/en-ca/help/turn-my-domain-auto-renew-on-or-off-41085 ). I think some registrars or services even offer prepayment options for auto-renewing, meaning that ernest might have set this all up before he disappeared, rather than slowly reappearing now...
Yeah, that chart needs to be updated. AFAIK no instance is still on kbin, everything has gone to mbin. It's also missing pyfedi/piefed