The ISO format is defined. Microsoft may choose to move beyond it (in fact I think they already have) and Europe, provided they’ve deployed software that doesn’t automatically follow along with this move, will fork and be left with their version. Leverage works both ways.

Tell me you’ve not migrated an org of 25000 50-year old public servants without telling you’ve not migrated an org of 25000 50-year old public servants.

Oh come off it.