I believe ultimately we will head towards a situation where anyone can request it at any time for any reason. Gating with health conditions is just to ease the transition.

That said, the great problem in countries with tax funded social and health services is the government have a distinct interest in persuading certain people to jump, and this is a serious moral hazard as some of the Canadian experience has demonstrated.

Today though the UK has the opposite problem, which is an enormous private residential “care” system keeping huge numbers of unwilling near vegetables wired up until they eventually die, transferring as much of the family money to the “carers” as possible. They have an awful lot to lose from this too, so I expect the fight to be a lot nastier from here on.