Horrible news, Roger. So sorry to hear this.
I agree with you on the "enviable" swiftness of the departure, but also with Mince and Red in that it was way too early.
As you know, I said what is likely to be my final goodbye to my mother last week, who at 91 is now on what they call 'end of life care'. In truth, I've been saying that final goodbye to her each time I've seen her over the past six years, not knowing if I'll see her again 2-3 months down the line on my next visit, and her not knowing who I was. It's not the way I'd wish to go, nor the way she'd ever have wanted to spend her last years of life - something she'd told us (my brothers and me) many times in the more lucid years. In fact, the accompanying loss of faculties at the time of admission to her nursing home six years ago has actually been the saving grace, in that not knowing she was living the end she dreaded meant that, for much of it, she smiled considerably more than she did in the rather painful years leading up to it. She also managed to kick a heavy smoking habit overnight, having forgotten she'd ever partaken, which quite probably doubled the final years.
But I share her dread, and your view on Drew's swift departure, Roger. I have every reason to expect my own will be along similar lines, having gone through a fairly significant warning to that effect 13 years ago. But, to the Powers That Be... there's no hurry!