Yes but how often in practice does the same information stay accessible via 30x redirects after one reorganization, let alone two or three?

Indeed. Back when I worked at a small software sweatshop^Whouse, I was tasked with migrating the company's static-ish website (a bunch of PHP files) into WordPress. Heeding the linked advice, I carefully set up 301 redirects from the old pages to new ones. When I look up the website now, the redirects are gone. Nobody cared to maintain them.

[flagged]