I'd never dream of driving into Central London because it costs something like $90 to park. The congestion charge is pretty much irrelevant for that use case.
It's a different system. In NYC I think most parking is charged. In London most on street parking is residents only which makes the small amount of parking for non residents expensive.
This is the major point for me. It's a policy miracle for some. Delivery, construction, repair etc etc jobs will be the ones it will hurt as usual. The rich won't care.
A business that functions on efficiently delivering services to Manhattan would likely benefit from getting there faster in exchange for some cost increases.
I'm sure any repairman would rather be doing 2x repair jobs in the time it'd take to do one + sitting in traffic for an extra thirty minutes. Most don't get paid to drive between jobs.
From my experience living in central London they just jack the prices to compensate. It's expensive getting a plumber here. Although I guess the charge is only part of it. The congestion charge here is £15 and my last two plumbers were £400 a time.
The guy who gets shafted here is the middle to upper middle class with a job that requires driving into NYC.