Personally I have similar experience, but other way around. Every time I try look for anything in Google almost always most of results are from 3-6 years ago unless I specifically specify I want results from last month / year / etc. And I not just talking about technical questions, but all kind of stuff include music, travel information and such. I not even sure when the last time google provide me the link to some new website with fresh content.
Like it's sometimes feel like web completely frozen and all content moved into closed gardens. I switched to DDG a while ago for this and bunch of other reasons, but I wonder if someone else noticed this. Anyone?