I know a few people in the ConEd trenches, one guy is a lineman who does all the >=69kV stuff and the other guy worked in substations and was in mott haven last I spoke to him (cushy job).
I'm always amazed how much new tech con ed has installed and how much old stuff is still kicking around. I live in south queens and we're all 4kV overhead fed from area subs in turn fed by 27kV. Some of those 4kV poles have westinghouse transformers from the 30/40's still in service, glass insulators, and leftover wooden pins from older insulators. Some are so old the primaries have fallen off and just hang between two adjacent poles, some the crossarms are half falling off. Amazing this grid doesn't go down more. Then the next pole is brand new, composite strain insulators, cutouts, reclosers, metering, etc. All modern hardware. And I know some areas they upgraded the 4kV overhead to 27kV. The secondaries are in even worse condition, ancient cloth insulation half weatherd/baked off. But it all still works.
I really love how there's this massive network of cabling and systems which orchestrate the flow of power from multiple synchronized generators so it can get to your humble wall socket and charge a phone or turn a light bulb on.
Years back I remember ConEd was replacing two or three very large transformers down the street of a large venu I was working an event. Turns out we worked the same event the next year and amazing the same day ConEd again had the second transformer scheduled to moved into place. What an operation. Huge trailer from Bay Crane along with one of their giant hydraulic cranes. Was told the transformer weighed in at 240,000 pounds.