I feel the same way about Moodle as you do about DocuWIki... it's brittle, and the updates aren't semvar-- a minor verions upgrade could ereally hose you. But

I feel the same way about Moodle as you do about DocuWIki... it's brittle, and the updates aren't semvar-- a minor verions upgrade could ereally hose you. But with WP, the WP 5.5 thing where they killed the automatic jQuery migrate inclusion was about the only time in the last year or so when I was caused serious problems by an update (for context, I manage around 500 WP installs for gov/large businesses and a univeristy). There was a pretty bad security issue with a popular file manager plugin, but we council folks to stay away from those solutions anyhow. I feel like in general the ecosystem has gotten a lot better about the update system.