One of my friends commutes exclusively on FSD in this Tesla. He even purchased a device on Alibaba that disables the attention checks. He spends most of his time doomscrolling on this phone or napping when the car drives itself.
The only time he takes over is in a very tight garage where you need to drive really close to walls and FSD freaks out a bit.
I'm not condoning his behavior, but it tells me that FSD if "mostly works" for normal applications.