I figured out how to generate random strings made of alpha chars in Google Spreadsheets (unfortunately not available in Airtable):
=concat(char(65 + Floor(RAND()*26)) , concat(char(65 + Floor(RAND()*26)), char(65 + Floor(RAND()*26))))However, it seems to get recalculated any time I change any other cell in the sheet!
I think I can just live with generating the id
in the terminal, then pasting it in.