> - it's related to the annouced GPS disruption test (although that's a really long time and doesn't seem urgent enough)

Those are done regularly without TFRs. See recent example in Texas:

* https://avbrief.com/overnight-gps-testing-affects-huge-area-...

A link to a list of notices at:

* https://www.navcen.uscg.gov/gps-service-interruptions

I don't know which Reddit thread you're reading (there are many I'm sure) but the one in r/Aviation seems to have a favourite theory that there was a credible threat of someone with MANPADS, which are shoulder-launched surface-to-air missiles and not some sort of sanitary product.

Apparently they have a ceiling of 18,000ft which is exactly the limit of the restriction in El Paso. Aircraft are allowed fly over if they go above that

> GPS disruption

Ah, a very plausible explanation!

https://avbrief.com/overnight-gps-testing-affects-huge-area-...

The map indicates it will be centered on Lampasas and the region of effect seems to be east of El Paso. So, if the GPS exercises are the cause, the TFRs would've been more likely to bring in Austin, Dallas, and San Antonio.

Isn't it possible that a 10-day TFR could be lifted early once the concern is past? They've probably made it 10 days just to establish an upper bound.