It had been in the works for a while, but now it has formally been adopted. From the article:
The regulation provides that by 2027 portable batteries incorporated into appliances should be removable and replaceable by the end-user, leaving sufficient time for operators to adapt the design of their products to this requirement.
It improved enough in the last years to allow foldable smartphones… it can improve enough by 2027 to make batteries replaceable.
Always possible, and given the choice between a phone without a replaceable battery vs [functionally] the same phone with one I’ll always take the latter, but consumer battery tech has moved at a glacial pace compared to screen tech. Samsung plays in both industries though so maybe this’ll light a fire for them to speed up battery development.