Pretty much every single html email also has a plaintext version attached, otherwise it hurts the deliverability. You just need to set your email client to use the plaintext version.
Sadly... no it doesn't. I use emacs for my email, and while I could make it not render html email at all, the vast majority of my correspondence is with people sending rich emails through outlook. So... yeah, html it is.
yeah, it does. There are tricks to make it try to look like rendered html, but they all fall flat IME, and it ends up coming across as text. If you get rid of that expectation, it works fine. I get plenty of html emails every day, but all I see is text.
I think we were just talking past each other. I took your statement to mean convincing others to stop sending HTML emails. You meant it more to just focus on the text. (If I am reading correctly.)
In that, yes, I agree. Bonus points for being able to inline respond to messages again. (I hate Outlook's forcing top posting.)
Ah yes. I was confused by your response. That makes more sense. No, I generally don't ask push others to use text-based email, but when asked, I explain the difference with a definite preference for text.
One thing that seems to have helped me (but is very much YMMV), is when I reply, it keeps the html code all messed up. Then when the person I'm discussing with sees that, they'll occasionally ask me why their email is messed up. That gives me an opportunity to explain html vs text, and they usually would rather their email "work everywhere".
Morse is readily adaptable to whatever you can sense: I've experienced it with sound, light, and vibration. Taste, heat, and smell might not work so well.
For input, you need to be able to reliably close and open a switch. This may be difficult for people with tremors, but many accessibility systems are built around single bit inputs, so it's a start. If you can manage another input method, it can be translated to Morse as well.
Internationalization is harder, it's not a good fit for non-alphabetic languages.
Morse code is highly translatable to other senses assuming that the audience had a reason to learn it. I can't think of a single disability with lack of temporal awareness, and only a few with impediments to temporal perception (as you noted).
That said, I don't know ANY blind sea captains. This will be a problem for adoption.