"We wanted to let you know that starting August 2022, you’ll no longer be able to send MOBI (.mobi, .azw) files to your Kindle library."
That said, that was August 2nd and sending that file as MOBI did work.
(And the success e-mail message they sent me today said they did convert the Man and Superman EPUB to "Man and Superman: A Comedy and a Philosophy.azw3".)
It's worked about 90% of the time for me. Basically everything I've sent to kindle the last two months I've sent as EPUB, and most of it worked. A lot of them were the "Compatible EPUB" version from Standard EBooks. (Even though it says they're not for Kindle, that appears to be out-of-date.)
So I just tried Man and Superman this way -- https://standardebooks.org/ebooks/george-bernard-shaw/man-an... -- and it worked just fine. I guess I don't know if the formatting is completely correct, but I haven't had any difficulty reading books loaded this way -- pretty sure they look significantly better than the Project Gutenberg equivalents.
If you're just talking about old enough to have a grandchild, 50 is plenty old -- indeed, old enough to have gotten married after college, had a kid who got married after college, and that kid now has a kid of their own. At least one of my high school classmates did that. (I'm 51.)
If you're talking old enough to be, say, a college student's grandma, then obviously your 70-90 estimate is much more likely.
(Bigger picture: I've been professionally programming for three-and-a-half decades. I find myself more and more annoyed by the user-unfriendliness of tech as I age. As an on-topic example, earlier this month Amazon's mail-to-Kindle feature rejected an EPUB I sent it, and when I used Calibre to convert it to MOBI and sent that instead, lectured me that MOBI was obsolete. I guess this is especially annoying because it seems like they're replacing a service which basically never failed with one that is failing like 10% of the time I try to use it...)
I just carry a small Anker USB-C hub in my laptop case -- has two USB-A ports, an HDMI port, and an SD card reader. I must say, though, I've used it less than I expected to when I got it.
The basic clock app on my Android phone takes 33MB of memory. That is completely and utterly insane. Except for playing MP3 alarms, everything on it could be done on a 64K Commodore 64 without breaking a sweat. And of course, the actual code for playing an MP3 is baked into the Android operating system, so that's not what's taking up all the space.
You're absolutely right that social skills can be learned. But note that they can be massively harder for some people to learn than others. Social skills that come almost automatically to your average person can be a lot of a work for someone with Asperger's to learn, for instance.
I'd simply guess he'd never heard of it -- it was pretty obscure in the early 1970s. It might have been less accessible to beginners, but Forth was the perfect language for those early microcomputers. I loved programming in it on my Commodore 64.
That said, that was August 2nd and sending that file as MOBI did work.
(And the success e-mail message they sent me today said they did convert the Man and Superman EPUB to "Man and Superman: A Comedy and a Philosophy.azw3".)