They dismantled the team who maintained the mdn docs? That’s shortsighted. mdn is a magnet for web devs and helps Firefox to stay in developers’ minds.
No? Like there is enough surface area to work on multiple unrelated parts of Firefox at the same time.
Also, Rust team is most definitely not killed, Servo is, which frankly, made perfect sense. Developing one browser engine is hard enough as is, let alone two.
There is an increasing amount of Rust being incorporated into Firefox, it is just not Servo.
And while it is possible to develop two browser engines at the same time (though it is not surface area, it is a different module competing for the same spot, so no, I’m not contradicting myself), it is still a dumb decision to split the already few people with the necessary technical knowhow around such an advanced domain. Otherwise you would see thousands of browsers out there, yet all we have (ones that implement a reasonable amount of the web standards) is chrome+edge, safari and firefox.