FAA restrictions aren’t applied in a hand wavy fashion.
This story would suggest otherwise.
In what way?
They don't have a mechanism for doing that. A military base near me has had continuous flight restrictions for decades. Each notice lasts a few months (e.g. https://tfr.faa.gov/tfr3/?page=detail_5_8746) and before it expires they issue a new one.
The NOTAM system certainly does allow users to specify the end date for a TFR as "PERM" (Permanent).