So I've installed NChat, which is supposed to give us chat functionality, but that doesn't work, not sure if it's incompatible with SMF 2.0.15, but I do occasionally see "Function create_function() is deprecated" errors in certain logs.
I've also installed the mailinglist along with groupnotify which is supposed to give us back email functionality, and after fixing an incompatibility with PostGres I find it's also generating "Function create_function() is deprecated" when I try to post by email.
Apparently this is a PHP 7.2+ issue:
https://www.simon.me.uk/2018/725_smf-2-0-on-php-7-2This is going to take a while to sort out, not sure which path I'll wind up taking, but perhaps I should update to the beta of 2.1. We'll see.
Update: there's also some more SQL errors that the mailing list plugin adds, this time it's OR must be boolean instead of integer, so I've got some more SQL to fixup too.