hackaday.com is the only blog that has stood the test of time for me, been reading it for 15 years.
A couple more:
BBC R&D. They don’t post very often, but what they do post is often extremely cool and high quality. E.g. Deploying the world’s first large scale temporary private 5g network for broadcasting UHD video of the King Charles’ coronation
Project Perfect Mod - old school command and Conquer blog, Banshee that runs it is still posting on the daily, I don’t know how he does it.
Cloudflare - interesting tech and case studies
Google Cloud - same as above
The Conversation - super interesting crowd-sourced blog written by scientists and researchers in all sorts of topics, generally very well written