Actually very interesting. He's right on all counts.
For whatever reason, though, e-mail quickly became email as America went online. My guess is that unlike x and t, e is a vowel. 'Email' reads as it sounds.We had T-shirts and X-rays for a long time before electronic mail showed up, but we still aren’t writing about tshirts and xrays.
Yes and I like his explanation of when and how to use first person singular "they." I agree that h/she and he/she and he or she are all awkward. If there is no easy way around it, go with they. I'm intrigued at his mention of Mx for a gender-neutral person.
The great Michael Spivak has spoken, kind of. It looks silly, but it's the only solution other than first person singular they to have ever become common usage in a community with no particular interest in gender that I'm aware of, and is less ambiguous.