No language guarantees high-speed code. Rust, like C and C++, is also perfectly suited for writing slow code

I’ve never tried Deno. The joke was about the guy’s obsession with those four letters and an extrapolation to what the next name or state of project might be.

Node-> Deno->Done?

Yes

UX / design, it looks very similar to twitter for me, ie you have text field like in twitter where you write your memo and can use tags. So visual similarity mostly