What A New York Non-Compete Can And Cannot Do
The enforceability question has moved repeatedly in recent years. Here is the framework courts apply, and why the clause in your contract may be weaker than it reads.

Non-compete clauses are drafted to sound absolute and are enforced conditionally. The gap between the two is where most of the confusion lives.
New York's framework
New York has no statute broadly authorising non-competes. Enforceability is decided by courts under a reasonableness test developed through case law. Broadly, a restraint must be no greater than needed to protect a legitimate employer interest, must not impose undue hardship on the employee, must not harm the public, and must be reasonable in duration and geographic scope.
Legitimate interests are narrower than employers assume. Protecting trade secrets and confidential client relationships generally qualifies. Preventing ordinary competition from a departing employee generally does not.
Courts can rewrite as well as strike
New York courts may apply partial enforcement, narrowing an overbroad clause rather than voiding it. That cuts both ways: an aggressive clause is not automatically void, but nor is it enforceable as written.
The moving picture
Both the federal position on non-competes and repeated legislative proposals in Albany have shifted in recent years, including attempts at broad statutory bans. Anyone relying on a summary written more than a year ago is likely relying on something out of date. Check the current position before acting.
What usually matters more
In practice, non-solicitation and confidentiality provisions do more work than the non-compete. They are narrower, easier to justify, and therefore more likely to be enforced. An employee focused entirely on the non-compete often misses the clause that will actually constrain them.
If you are negotiating one
Duration and scope are the negotiable parts, and they are far more negotiable before signing than after. Ask for a carve-out for your specific field, and get any verbal assurance written into the document.
This is general information, not legal advice. Speak to a qualified New York attorney before acting on any of it.