I recently upgraded from 22.04 LTS to 24.04 LTS. Other than replacing the snap version of Firefox with the deb release, I needed to make no other changes. It's working well so far, but one thing has occurred that makes me scratch my head: I use Webmin for a quick all-in-one control center for my server. Webmin will throw a notification when updates are available and then process them when I choose to do so.
Under 22.04 LTS, this rarely threw false notifications about updates, but I'm seeing more now. By 'false alarm' I mean receiving a notice that updates are available but when I go to process them I receive a message that the component being updated is already the most recent version. This is not a problem per se, and I suspect the actual updates are being made to the repository information, but it's happening more frequently under 24.04 LTS. Just my observation....