Same, been doing this since the start of the web. I have decades of web pages I've found interesting over the years, and its all offline/local searchable and will be there for me when the grid goes down.

I'm part-way through getting the 90,000+ PDF files collected in this manner, analyzed by an LLM so I can .. query it about my own interests, I guess? ;)

I don't find that saving URL's is very productive - they are the dangling pointer of the web. Far better to have your own cache of docs to refer to imho ..