In terms of the dreaded negative test requirement for the trip back to the US, it seems quite possible that as a country like Norway,Switzerland or the UK drastically reduces covid related restrictions, that so too will testing sites become less and less common. Perhaps in the future covid testing sites might be more airport centric, and then if one is flying home from a smaller, less well traveled location one should pay attention to testing possiblities, like coming home from Crakow or Zagreb than Heathrow or CDG.
I don't think that will be the case in France.
The testing apparatus here is mainly for residents to be able to test in case of need. They're not going to diminish that just because the U.S. (at some point presumably ) removes a test requirement for entry to the U.S. I don't have any statistics, but I would guess that those kinds of tests have accounted for a very small percentage of the overall tests taken in France.
Only time will tell. However you still have the option of taking a proctored test kit with you to use before your return. So I wouldn't sweat it.
I agree with Kim regarding France. They are set up to handle the local folks needs and tourists are a sideline (except at the airport).
Rob was referring to countries (not France) that have (or will) drop the testing requirements for their own citizens. The question is when there is no need for the local citizens to get tested, will there still be multiple places where we can get tested prior to returning to the US?
Even if a country drops a testing requirement for its citizens, people are still going to take tests for their own healthcare needs.