If all you measure is "what is mainstream culture doing" then yes, social media dominates. But there are tons and tons of topics that have active bloggers, tech among them, certainly. A lot of the blogs in my RSS feed get regular updates.
So I've been recently just skimming through (next post -> next post etc) Kagi Smallweb and it's been a lot fun. Good way to discover new stuff easily. I actually wish they had more content though.