There is a theme among systems for collecting information via forms
which lends itself to recursion. I built a form processing system 30
years ago that called itself to specify and process the forms that it
then used to build new forms for new apps. The forms comprised fields
in a db and the form engine supported real-time spreadsheet
functionality like Excel. This system by Lucas, which uses web2py to
build apps to build web2py apps, reminds me of that a lot. It's cool.

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