There are many beautiful classic binoculars with no electronics available these days, with better performance than what was available five or ten years ago. Several of them I would love to own, have sitting on my shelf and occasionally even use, but for serious birdwatching I no longer use binoculars without IS. I simply see that much more and more easily with them. As far as IS binoculars, I would very much like to see even better models than the current cream of the crop, but as for now the Canon 10x42 IS L offers the best stabilized image available and that is what I will use until something better comes along.
I don't consider electronic IS obsolescent, on the contrary, I now consider non-stabilised binoculars largely obsolete.
But I sympathise with the sentiment of wishing to hold on to lifelong service-free reliable purely opto-mechanical instruments.