Nothing revolutionary, but I just set up a Hugo + Baserow.io connection which is nice.
(Baserow is an open source airtable-a-like, which very helpfully builds a specific API document for the data structures you make there)
Vanila html form on the Hugo site, simple js script, free database on Baserow.io, and now I can collect data and do things with it at the baserow end.
In future I can put processed data into the Hugo ‘Data’ directory and incorporate it into the built site.