I'm so for it, I've seen too many loved ones suffer for far too long before they died not to mention their loved ones who have to watch them, trying their best to give comfort, that's if they can, they're suffering too.
My ex-husbands gran had a massive stroke which paralysed her and she was in hospital for 2 years until she died, she didn't know who anyone was and was unable to speak or communicate. We visited every day and night which was drain on us all mentally and financially as the hospital was 30 miles away, but we always hoped she would come back to us so we kept going, kept holding her hand and talking to her,hoping she was getting some comfort from our presence,hoping she wasn't in pain & trying to bring her back to us as she was precious.
Going through that 40 years ago made me realise that I don't want to linger in pain being a burden on my family or the state for months or years I want to be able to choose to die peacefully on my terms.