Yeah - smaller pretty much means a separate board for each purpose, and I routinely end up making purpose-specific boards for that reason. Those are more for one-off's and prototyping - though I've made a few ESP8266 APA102 controllers on those boards.
All of the normal IO pins are supported (except the ones used for communicating with the flash, of course). I don't think pin 16 (the one that's used for the sleep wake thing) is supported yet? I haven't been following that aspect, since I'm using them in stationary applications.
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