I find the full screen window disorienting. Then TimeMachine doesn’t tell me when there was a new version. I find the timeline in Cornerstone much better:
Yes, I’ve seen that (in Cornerstone - I have v2.7.18) but never made particularly much of it. I’ve not actually dared attempt any sort of revert to previous version in Cornerstone, as the effect of commands other than those I use remains unclear to me. But it’s very nice for comparing versions.
In TM I just go by the date of the project file.
I’m not much into reverting either because those commands are so arcane. I recently had to merge an older version into a newer one. I somehow got that done.
But I often use the timeline view to check changes. I export older versions by drag-and-drop and then I do a comparison with Arbed.
There are many ways to work!