> Emacs is in that disastrous stage of a product's life where the geezers destroy their own community by refusing to adapt to new expected behavior
It doesn't look like your an Emacs user. As another commenter pointed out (as did the article indirectly), Emacs has more users than ever. It's definitely growing - not dwindling. As an Emacs user, the last decade has shown an immense growth in capabilities via MELPA packages. The number of sites with tips on improving Emacs flows has also gone up exponentially.
Not only is it not dying, it's thriving.
> They were standard when Ronald Reagan was president.
For a whole other definition of standard. A lot of the popular DOS applications from Reagan/Bush's time did not use these keybindings. Ctrl-Ins and Shift-Ins were the norm. Ctrl-C for quitting was the norm.
(I'm not against CUA bindings by default - merely pointing out a misconception you have).
> But for everyone else, Emacs is a small part of a much larger ecosystem (MacOS, Linux, Windows) with which it is increasingly incompatible and archaic.
Actually, Emacs is pretty good at interacting with the wider ecosystems. It can communicate and interact with other processes, etc. I can, for example, link to a message in MS Outlook and have it open up in my TODO list in Emacs.