I don't know if anyone has posted this link already but here is a real good YouTube channel on old Macs that I am addicted to right now.  This guy does a real good job talking about various Macs, including their history, specs etc.    For some reason his channel has very low views, but the quality of videos is really high.

https://www.youtube.com/channel/UCldRG8C0bMMXmGsmoNtHEgQ

PS. I am not Jason