Hi @iSENSYS,
Glad to hear you’re keen for it - I’m pretty stoked too! 
All our products have their dated version history at the bottom of the Technical Details on their product page. As you mentioned our hardware updates haven’t exactly been stagnant, so including every revision detail on the broader technical reference page likely isn’t practical.
It’s perhaps worth noting that while we’ve continually been updating our products since the company began, we’ve recently changed to more explicit “R” changes on revisions that affect the end-user, which is discussed in a bit more depth here.
Yes
Depends what you mean by this. Downloadable files I believe we’re trying to keep available across versions (e.g. datasheets and 3D models), but the full in-depth technical details tables not always - it depends somewhat on how big of a change there’s been and how long it’s been since the change.
External changes like swapping over to a WetLink Penetrator are relatively easy to check for, but internal ones your best bet is comparing the purchase date to the dates in the gripper revision history
If that’s inconclusive (e.g. because you don’t have a record of the purchase date, or bought something second hand) you can either post here or contact our support team (support@bluerobotics.com) with photos of the internals. That likely isn’t an issue for most products, and in future will be less relevant because we’re moving to make revisions more traceable and externally verifiable across our product lineup