Funny enough, due to a tailwind the other day, flights a couple days ago across the Atlantic actually did break the sound barrier. Look at this IAD>LHR flight that reached 802 mph [0]. (It was a Boeing).

[0]: https://www.flightaware.com/live/flight/VIR22/history/202402...

Nah; its groundspeed might have been more than the speed of sound, but "breaking the sound barrier" refers to your speed through an airmass (i.e. airspeed). It doesn't count if you're just getting a big tailwind.

that happened once. N475EV; the inertial navi failed and the chain of issues afterwards created a sudden dive.

The most reliable reports seem to indicate it "only" hit Mach 0.98; It seems highly likely that there was supersonic flow over parts of the airframe at that speed, but the aircraft itself was not supersonic.

> When the airplane was approximately 150 nm northeast of Thunder Bay, Ontario

That’s the best place name for accidental supersonic flight, if you ask me.

Far away from people on the ground for when the wings rip off.

(As happened on a 767 in 1991 when a thrust reverser malfunctioned and deployed in mid flight, a problem that if not addressed within seconds is irrecoverable.)

https://www.youtube.com/watch?v=WsYU7tjOvm0

No one survived this accident, the worst aviation disaster in Thailand's history.