[cbdfghh]

>employees weren't allowed to quit

In the US you can quit and look for another job, the same way how MS can exit the OS market.

The same way MS doesn't leave the OS market (too lucrative), most people don't walk off on their jobs.

[whybroke]

non-compete clause

[cbdfghh]

Not everywhere. CA, for example, doesn't permit them.

But companies also have non-compete (or other exclusionary) clauses which are legal outside of anti-trust laws.