How can I distinguish between CSV/JSON overpass query returning no entries and query timeouting and failing?
See overpass turbo for an example of silently failing query.
At least, silently as far as I can see (looked into browser console and see nothing in response that allows me to distinguish “query timed out” and “all buildings were suddenly deleted”)
Obviously, in this case I can know that building are likely still in OSM - but in many cases such assumptions cannot be made.