Currently it's only diff or page itself, but history may contain enough enough for the changes to be considered reviewed and the bold/"updated since my last visit" to be removed.
This was requested in the linked message, I don't know if it's actually a good idea but looks worth tracking.
Version: unspecified
Severity: enhancement
URL: https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_%28proposals%29&diff=491984259&oldid=491984204