My experience was that it worked fine using the recommended procedure - really, just a matter of doing a do-release-upgrade. No issues encountered; during the various prompts, the usual answer was not to change the current settigns (e.g. when updating grub).
I then used the opportunity to upgrade nodejs, npm and the ghost-cli
One potential - as MySQL upgraded to version 8 during the release upgrade, some of us encountered an issue with database collation, which appears when updating ghost. Solution here.
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