It heavily makes heavy use of parallelism and the GPU which increases the responsiveness. It's also uses Rust as a programming language instead of C++ which will prevent a whole category of bugs like buffer overflows and use after free.
Demonstrated a successful code execution attack against Safari to gain root privileges using an use-after-free vulnerability in Safari and an out-of-bounds vulnerability in Mac OS X.
Demonstrated a successful code execution attack against Microsoft Edge in the SYSTEM context using an uninitialized stack variable vulnerability in Microsoft Edge
Demonstrated a successful code execution vulnerability against Microsoft Edge in the SYSTEM context using an out-of-bounds vulnerability in Microsoft Edge and a buffer overflow vulnerability in the Kernel.
etc. Highlights mine. All of these are prevented in safe Rust.
My general belief is that general-audience users don't care at all about bugs like those. Which is why we have so very many of them, and have for decades.
It's the same benefit you get from strong, static types in a large project vs one with dynamic/weak types, but for another category of bugs. In large projects, it makes a difference.
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0. Hopefully you'll forget the meme ;-)
Software stabilizes over time, you find problems and then you fix them. How often are these class of bugs causing catastrophic issues?
That's really the important question.