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
I wish these regulations would have shorter timeframes. It does not take 4 years to add a removeable battery. Decrease it to 2 years