That's a neat interview, thanks for sharing dirkdebeule.
Not really a question, just a comment...
Donald, I don't know if you've seen this, since you say that you mostly don't play other deckbuilding games. But a common pattern I've seen is to mix all the cards together, and then there are just a few random cards available to take at any time.
The advantage is that instead of 25 kingdom cards in a set, you could print 250 unique cards or something. Also setup is easier, and there's less info to process upfront. On the other hand, it feels incompatible with variable setup. There are differences from game to game, but we're still drawing from the same random deck, so there's a sort of uniformity to it. We've enjoyed lots of deckbuilding games, but a bit disappointing, and one of the reasons we play more Dominion.