I suspect some companys will absolutely use this as Marketing stunt " Look how customer friendly we are" cant wait for the Iphone advertisements that make it look like they invented it for the first time ( they advertised in germany still like 3 months ago that you can delete sent messages )
So likely some companys will Release way earlier phones with Removeable batterys is my guess
Fairphone has existed since like 2015 or before so anyone else would be late to the game