"Your node no longer offers a version you've already passed as an 'available update'. If you sideload or skip a release, any stored pointer to an older version is dropped on next restart — the System Update page only offers genuinely newer releases.",
"Version comparison is now numeric rather than alphabetic. 1.7.10 correctly outranks 1.7.9 (the old string-order would've got this backwards once patch numbers hit double digits), so update prompts stay accurate past the nines.",
"A stale manifest from a slow cache or proxy can no longer downgrade your node. If the manifest reports a version equal to or behind what's running, the node treats that as 'up to date' rather than offering the older version as an update."