NJ Transit exists to funnel workers to and from Manhattan.
Workers don’t want to work in Manhattan anymore or spend time and money getting there.
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