Old posts with outdated info, which are irrelevant to the currently supported versions, should be excluded by the search engine bots. Perhaps, they should be marked and archived (i.e.: Internet Archive, Wayback Machine).
This is not a thoughtless post. I am active on Internet Archive, regularly searching for information for Wikipedia. The current process of recommending webpages for archiving is very slow. Which entity archives webpages currently? Companies who want to eliminate advertising outdated products.
The same Ubuntu tech page from 2004 popped up twice in a search result, and that is on Ubuntu to deal with. Block these pages from being included by search engines. This doesn't need an individual's involvement, and we gain more time by not reading irrelevant solutions to current problems (in 2022).
dist-upgradehave been deprecated... Actually, not a single thing you mentioned has been...