The Dacor griddle is nonstick so not sure how long it will last. I would not have a dedicated space to one use if it were me, but I would have one of these if you need a griddle.
I have a Dacor griddle left from the range I had, that they bought back last year, but I haven't used it so can't say how it cooks. I did end up with a Wolf range and love it. There is NO comparison in the quality in my opinion. Just pull the knobs off both and look at how they are made. One of my Dacor knobs broke just turning it off. I have found the Wolf much easier to clean as well.

Here is a link that might be useful: Chef King Griddle

Griddles get dirty but can be cleaned, at least to some extent. Some ranges have a cover that you can put over the griddle when not in use - that might solve your problem.

A removable griddle will not transfer the heat as well as a built in.

John.com, do you have any data to support that? Show me the science! I think it would depend on the stove, burner configuration, what the griddle is made of, how long the griddle heats and user skill.

>>John.com, do you have any data to support that? Show me the science!

You are kidding right? Data? Science?

It is my opinion.

That's a fact.

We have a Dacor 36" range with the removable griddle. We like the griddle, and prefer the 6-burner configuration to having a 4-burner + built-in one.

The griddle is made of thick heavy cast aluminum. When you first turn it on, there are obviously two hot spots under the burners. But eventually the heat transfers around and it gets very nice and even.

Dacor vs Wolf? There are aspects of our ERD-36 that we really like, and other aspects we dislike. In retrospect we should have bought the Wolf, but at the time, their dual fuel range was very new to the market. And their oven is noticeably smaller than the Dacor. Note that in fairness to Dacor, ours is the prior generation range and the current products have had a lot of redesign.