Anything that uses GPS time (many devices use GPS as Stratum 0) would break. For example stock exchanges that use RF would become out of sync.
This includes traffic lights and various other quality of life improvements that rely on LTE and 5G connectivity. Also all mobile data would be depreciated.
Many wars that involved any precision munitions would stop.
Many air gapped facilities use GPS time as opposed to NTP which includes powerplants nuclear safe guards, and industrial systems will start to become depreciated.
I'm a golden retriever. I'm not really sure what's going on, but I'm all for it and excited