R20: Gave us node materials, fields, volumes and the CAD importer, 9/10
R21: Cheap versions removed, Subscriptions added. new extrude bevels and Windows 4k support, 3/10
R22: Lots of smaller bits and general improvements, 5/10
R23: Nodes, but nobody uses them, USD, but nobody uses it, Magic bullet but poorly implemented, 2/10
R24: Online content browser, placement tools, currently useless scene browser, 3/10
R25: So bad, they didn't even give it it's own press release, 1/10
R26: X implemented, X overhauled, X overhauled, dozens of new X tools, X also implemented, 9/10
You can see why so many perpetual owners all stopped at R20. Everything since then has been a bit of an anti climax. Useful bits, but nothing that's going to change your life. R20 was nice for its 4k support, but the job is only 80% finished, too many elements are still low res. You can add bonus points if you happen to need USD support or GLtf export, but they're not complete enough implementations imho.
"We don't talk about R25, no no no..."