That was a fun read. I found item 6 interesting, "Separate functional and non-functional changes". Because that's obviously the sensible and useful thing to do. But at the last job, whitespace, reformatting and simple refactoring changes were strongly discouraged unless they were part of another functional change. There was a written policy about it.
Refactoring changes and such didn't have an approved Jira ticket, and you needed a ticket for every PR (even proposed PRs to show an idea). If you created a Jira ticket for the code improvement task, it would nearly always be set to lowest priority ("never" in practice) and the Jira ticket approval committee would rarely approve it for work in the next sprint unless it was accompanied by compelling business case backed by an enthusastic champion. A PM would never assign them, except as an onboarding practice task for someone new. You could self-assign them but you'd be taking a risk by working on something lowest priority.
In practice this meant people squeezed whitespace, simple refactorings and other improvements by comingling them into feature and bugfix changes. (Larger refactorings such as internal API and architectural changes, which that code sorely needed for ridiculously-bug-prone reasons and ridiculously-slow-development reasons, rarely got done at all.)