I recommend the new "Our Machinery" blog [1], where they write about a new engine development. Bitsquid was sold to Autodesk, rebranded Stingray and as of now seems to be discontinued [2].
Excellent, I'll check that out. As (at the risk of exposing my geriatric age) someone who did 3d engine and driver work back in the mid 90s to early 00s, I found the bitsquid blog really useful to warping my brain to the near era and the tradeoffs that matter today. Great stuff.
If you are into no-nonsense software design, Molecular Musings [1] written by Stefan Reinalter is also a goldmine. As is anything written or said on topic by Mike Acton, whose ramblings de-facto brought DOD into the mainstream [2][3]. Regarding good old days, remember Flipcode? ;) [4]
I also recently picked up "Data-oriented design: software engineering for limited resources and short schedules" by Richard Fabian, which I've not had a chance to read properly but looks like it covers things in detail.
[1] https://ourmachinery.com/post/ [2] https://www.autodesk.com/products/stingray/overview