[alexpotato]

I think people forget that problems like these have two parts:

- a technical solution that is generally somewhat obvious or at least is picking which of 2 or 3 proposed solution makes the most sense

- a co-ordination problem that will require hundreds of different entities to agree on timelines, rollout plans etc etc

Now, this does happen (Sweden switching traffic side of the road [0] an Y2K) every so often but it's a LOT of work.

0 - https://en.wikipedia.org/wiki/Dagen_H