Office space vacancy rate is 22% in North Jersey and 20% in Central Jersey. There’s no reason to commute to NYC when it’s cheaper to get office space in NJ.
And the workers can avoid commuting expenses and NY State and City income taxes.
https://www.cushmanwakefield.com/en/united-states/insights/us-marketbeats/new-jersey-marketbeats
A company in Midtown might have staffers from the Bronx, Brooklyn, Manhattan, Queens, Staten Island and Westchester, Nassau, Suffolk, Bergen, Essex, Morris and Monmouth counties.
For them to all get to a New Jersey office would be difficult without paying for relocation. Relocation is often impractical because many workers might have mortgages under 4% and even under 3%.