Because of user-agent sniffing by Netflix.
Firefox has been ready for a while. The problem was Netflix sniffing the Linux user-agent and going down the Silverlight path. Now Netflix has fixed that.
One of the many things that's hard about building a browser is taking the blame for stuff like this.
For people who want a digital assistant, somehow I doubt that "bixby" will be in any way more useful or functional than Google's. It's just more crapware that nobody asked for and nobody will use in sufficient quantity to justify its existence. It probably needs people to use all the other crapware and Samsung's cloud storage in order to function at all.
So that's what driving the use of Rust. The Rust compiler prevents data races so the design can be far more aggressively concurrent without risking corruption. The compiler also whacks issues like dangling pointers, buffer overflows, null pointer calls etc. by design so it stops a whole raft of common programmer errors. It wouldn't stop a layout engine from suffering application level bugs, like rendering a page badly, getting stuck in a loop, adding stuff to a list without bounds checks etc. so it's not a panacea, but its still better than C/C++.
"HPC leadership" by itself is pointless. China owning big computers doesn't put the USA at risk. It's what they do with them that matters, and whatever *that* is, you likely won't neutralize it just by building even bigger computers in the USA.
These HPC people are also glossing over the issue that for most important problems, parallelizing over commodity CPUs connected by commodity networks (i.e. the cloud) is far more cost-effective than the "big iron" shared-memory HPC systems, and via Google, Amazon and Microsoft, the USA completely rules that space.
If the USA needs to build really big shared-memory HPC systems to solve some specific problem connected to China, by all means propose that. General scare-mongering about "HPC leadership" is just an invitation to waste taxpayers' money.
The slope is slippery! WAKE UP SHEEPLE!
Hack away but consoles manufacturers are totally in their rights to block your device, sue you under the right circumstances, ban you online, or patch the firmware so new games won't play.
A bug in the code is worth two in the documentation.