If two or more RPi-Picos were attached to the same system, would I be
able to distinguish them e.g. based on the serial number in the USB
descriptor?

If there is no random serial, would then at least Pico and Pico-W be distinguishable?

If depending on the firmware: MicroPython would be important, uLisp is
on my to do list.

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Stay ommmmmmptimistic!

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