Here in South Carolina, I think it's 30 years old for YOM. Unlike collector or antique plates, YOM here has no restrictions on use, so it's just like a regular plate. They charge $30 a year, the same as a vanity plate. You just need to keep the date stickers with the registration and a letter you get from the DMV. I don't know if there is any difference in insurance, but I've got an agreed value policy with Hagerty, so not really an issue. 

In Michigan they offer both historic and year of manufacture plate options. I think the rules are about the same, with vehicle use limited to going to or from storage, a car show, a repair facility, to sell. You just need a ready excuse for why you are where you are at the point of interacting with the police, not really too difficult. Here the plates are required for insurance by Hagerty and the car has to be over 25 years old, which my secretary of state decided was 26 years old or more.
What they are trying to avoid is your using the car for work commuting, but you still can if you say at lunch you are doing an allowed use. There is a high demand for nice just over 25 year old cars in Michigan as we have the highest traditional insurance rates in the country, but with collector insurance the cost drops to next to nothing. Is this all a little shady for an every day car, you bet.

If you use collector plates, you limit how the car can legally be driven, plus you are stuck with the current plate design. Why not go with an original plate from the year of your car? Most states call them YOM (Year of Manufacture). I think Washington has the same thing but they call it a restored plate. (I just looked it up and they have the same restrictions as collector plates, which stinks. Okay I guess if you only drive the car to shows.)

You want to consider whether your car actually meets the criteria for eligibility and whether you can live with any driving restrictions involved. Insurance companies are not on your side and will do anything to deny coverage. Its not worth it to stretch the rules and have your coverage denied, if you have an accident. 

I’ve had collector plates for almost 20 years. Never have to worry about getting new tabs no emissions no nothing just put them on and leave them there. Hardest part for me was $85 to get your plates but once you get over that hurdle that’s all downhill. In Spokane 

I'm considering collector/vintage plates.  Pros?  Cons?  Washington state.