Um if you need backlogging, as I noted, a Bouncer will provide. if they don't provide it for free hosting this on something like a digital ocean droplet can implement it, but then again, it can get expensive.
Telling everyone to rent a VPS and run a server to hack in an essential feature is insane.
https://ircv3.net/specs/extensions/chathistory
Plus, again, IT's not necessary to rent a VPS. IrcV3 has a module for backlogging. You just have to actually plug it in and use it.