Very cool. Looking at the chainstate stuff, do you think it'll make it easier for me to do this task: a db query on the current utxo set to grab (scriptpubkey, amount) pairs that fit a certain filter on amount. I would have guessed not, but some of the existing uses you described were similar.
Didn't expect this today: The bitcoin kernel API is now in Bitcoin Core's master branch! A decade of effort for various contributors and three years from myself: https://github.com/bitcoin/bitcoin/pull/30595
Looking forward to an ecosystem of implementations, full nodes, and tools being developed around it!
Discussion
Mmh, I'm planning on adding coin lookups, then you can program that yourself.