Visvanath Ratnaweera

No, you can't disable versioning. Ref. How to disable the versioning of questions?

> if for whatever reason the quiz designer decides not to use the "Always latest" question version and selects a specific version, question revisions will not show even when "regraded."

Isn't that clear? Either you freeze the question (in that quiz), then it is frozen. Or, you let it "live", the changes will reflect in the quiz.

At a first glance the need for "regrade" looks like an obstacle. But better that way than questions interfering with a quiz on their own!

That is my observation too. I haven't seen a case where Moodle 5.0 broke due to PHP 8.4. Still, it would have been nice, if I had an official source, like closed MDL-80117.

Either way, I updated the chart http://www.syndrega.ch/blog/#php-and-dbms-compatibility-of-major-moodle-releases > New: Moodle 5.0 max. PHP is 8.4.

Did you try connecting to the SMTP from the CLI? It was explained in the post linked to the discussion you have linked:
https://moodle.org/mod/forum/discuss.php?d=460418#p1849007