what3words is not useful at all. 1) FAA (and thus the world) have a hard character limit of 8, this is to support old mainframes running (Delta, I'm looking at

what3words is not useful at all. 1) FAA (and thus the world) have a hard character limit of 8, this is to support old mainframes running (Delta, I'm looking at you) old unix dispatch software. 2) The cockpit computers have limited characters on screen. A FMC can display 28 characters x 16 rows at best. Most are 8 rows. Military aircraft have some that are 2 rows. The FMC or Flight Management Computer is really just an old embedded chip. 3) The entire airline, flight, tourism, booking, and ticketing systems of the world would need to change. Including all legacy systems, all paper charts, all maps, all BMS's, all AirBoss's, all ATC software, all radio beacons. There is no chance that any of this will change simply because someone came up with a way to associate words with landmarks you can't see from the air.