Note I am a supporter of nuclear energy.
Indian Point Nuclear Power plant was commissioned between 1962, and 1976. The oldest of the three was decommissioned in 1976 due to poor design and operational issues. The other two licenses were set to expire in 2013, 2015. Those two had a history of issues dating back from 2000. Any shot at getting their licenses extended was blown to hell when the operator, Entergy, refused to build a new closed-cycle cooling towers system at the cost of $1 bil. That was key due to environmental impacts on the Hudson River from the water taken, and returned to it.
The licenses for nuclear power plants last 40 years.
In NYC, LI, and at least in my area of NJ, you can buy your power from 3rd party providers. Example buy your power from Superelectric company rather than ConEd. Coned still provides the transmission of the power. This is because you cannot have a million different transmission lines from each power company. Same goes for gas service.
ConEd in particular has had ever increasing profits the last few years. A lot of that money is given back to shareholders with dividends. Coned pays $3.40 a share, and that rate has consistently gone up year over year.