Microsoft has never really "got" the idea of URLs. The only links to Microsoft stuff you should expect to still work properly in a year from learning them are in the form of an aka.ms alias which is publicly advertised.

Anything else, maybe it's a brief article explaining a technology you care about, next week somebody replaces that with a video blog of some people who don't really know much about it but are sure they'll become world experts over the next months and years - and you're invited on their journey, then the blog becomes a wiki, then it becomes an exciting new user-led forum, and then... it's a 404 because they were re-assigned to a different project and all knowledge was destroyed.

Raymond used to be just one of hundreds, maybe thousands of Microsoft bloggers. Then one day Microsoft decided blogging was not on brand and it just blowtorched all the blogs except a few very popular ones like The Old New Thing.