Generally speaking, non-compete are not enforceable but there are exceptions to the rule (some of which don't apply to general employees and potentially some that I may not know about).
That hasn't stopped some companies from suing if an employee leaves to a competing company and have proprietary knowledge (albeit rare).
I just took a job in Calfornia and their noncomplete agreement specifically mentions that its not enforceable in California so I don't think they would have put this in there unless they basically had to
Generally speaking, non-compete are not enforceable but there are exceptions to the rule (some of which don't apply to general employees and potentially some that I may not know about).
That hasn't stopped some companies from suing if an employee leaves to a competing company and have proprietary knowledge (albeit rare).