I have literally just posted a reply about PinePhone here.
They are just about to launch a decent NFC case for it.
Currently I use a Sony FeLiCa reader with an adapter since ACR122U readers don’t work well with it due to the additional controller module the ACRs have that implements an USB-CCID interface, designed to communicate with PCs… that doesn’t play ball with Nfcpy.
I’m sure you’ll come out with many more use cases!
But those two sound like a great start to me! 