I call bullshit on the "very quickly" part there. It'll take a decade to phase out. And some don't seem interested at all (my employer for instance).
They will likely take a decade, but only because this isn't top priority. They could be out in a month if it was important to them. The alternatives exist, there is just a lot of pain in switching that they can avoid by doing this over a decade.
> take a decade
More like several decades and 100s of billions of euros which nobody is going to pay. It will simply never happen and right now all the politicians are just quietly waiting for this whole thing to blow over.