Should I still bring this up to my boss?
"Hey, just letting you know, I turned down a job offer at 90k, because I'm very happy with what I do etc, don't want to leave, but maybe this is an opportunity to re calibrate my salary?"
If you had an employee approach you in this way, how would you respond?
Respond? You're playing games--I would seriously question both your veracity and your commitment.
Glad you didn't take it. Just discovered this thread and would have suggested two things when the offer still seemed viable: First that you really think twice about leaving a stable employment for any hot shot startup, and
second that the cost of living in NY vs Tenn. easily eats up much of that salary differential so it's not as good as it looks. Neither is necessarily a deal breaker but you have what sounds like a good situation where you are, with continued potential for growth.
Congrats on the upcoming family addition.