examples of Rust code that is better than the equivalent C code
Read the article and read the email. Try hard.
Aren't Google and Dropbox Rust backers?
Don't they ever have any mercy?
No. They're just getting on with using Rust to improve Firefox.
The complete absense of any examples of Rust code that is better than the equivalent C code would be
The lack of traction of Rust outside of those that back it
I think you're a little confused about what evidence is.
start up so slowly
Firefox 57 starts up in a second or less for me. Have you tried it?
There is plenty of evidence to suggest that Rust is overhyped, provdides little benefit if any in practice and won't be around in its current form in five or ten years, though.
So show your evidence. Where is it?
Hmm. I suppose a benefit of the technical problems Slashdot has had in the last little is the happy side effect of blocking APK posts.
But it seems Slashdot really is back up and running now.
The one thing that had been keeping website operators honest
No. It just made them use Flash which was a worse outcome.
"I say we take off; nuke the site from orbit. It's the only way to be sure." - Corporal Hicks, in "Aliens"