History of hardware revisions and their respective specifications

It would be helpful to be able to access the specifications of past hardware revisions of each of the models that are or have been on the market.

As it is there are fragments - a list of throughput specs for various Balance models (What is the Throughput for my Balance Hardware Revision?), some pictures identifying the past versions of some of the Balance models (such as What Is The Difference Between Hardware Revisions of Peplink Balance 305?). But if I want to look for the specs of any specific model, I don’t know where to look except through haphazard network searches.

Suggestions (if this has been collected and published already) or hope (if somebody is in the process or plans to create such an overview)?