I am filing this as a sibling issue to #3995
In the WP dashboard, the "Welcome to WordPress!" block can be dismissed (per user), via a link at the top-right:

We should introduce such a feature as well; perhaps in a way that it can be reused by other blocks too.
GitHub Issue #:
3996
Recent comments
Thanks, the /tmp folder was the problem. I moved it elsewhere and then the updated worked. Thanks again!
Update 1.35.1 appears to install but hasn't
Probably not the reason, but worth to do a quick check: Sometimes the update cache interferes, so if something's odd with updates - some module (or core) claims to have updated, but then...
Update 1.35.1 appears to install but hasn't
Nope, not touched any permissions!
Update 1.35.1 appears to install but hasn't