[ecspike]

I'm pretty similar except for the digital portion software. My final work notes live as an org-roam database because it has really rich linking, export and embed options. Day to day is in paper and the pertinent stuff is "elevated" to digital.

Diagrams get inserted as an image as-is and can be tagged with pertinent info. I do have the benefit of having decent handwriting that most can read as is or be OCR'd.