This is really fascinating, but probably something that is needed. If nothing else it means airports will stop needing to re-paint their runways periodically. Tampa had to repaint runways in 2011, Stansted had to do it in 2009 and thinks they’ll need to do it again in 2055 [0].

Of course, to get there we’ll have to repaint a lot of runways and replace a lot of signage for runways that currently correspond to magnetic north.

[0]: https://phys.org/news/2011-01-tampa-airport-runways-renumber...