I suspect this is his medium term plan: to stop making videos altogether but leave old videos up and keep collecting donations from whoever is stupid enough to keep sending him money. That would probably amount to substantial free money each month for years to come.
No one cares about outdated YouTube videos about an obscure religion. Most of his content is ephemeral as it's commentary on latest convention talks etc... Those get outdated very quickly, and views will fall off very fast, so there will never be lots of sustained base-level traffic.
The era of tech companies throwing printed money at creators is coming to an end. The economics of most of it was always fake but perpetuated while money was sloshing about in the system. But now people are tightening their belts, and that includes advertisers.
The majority of his Patreons would have to drop him if he didn't create new any fresh relevant content. Most are too dumb to realize that's pretty much already the case, but even the stalwarts will give up when it's past even pretending.
Other people will arrive that do things better, produce better content, appeal more to the newer audiences because they'll have newer relevant experiences than his outdated knowledge of the WTS.