Don't know about rockers - never built one, but they have a lot of stress and racking...
Regular chairs -sure.
I built six of these a couple of years ago and no problems. All the joinery is domino except for where the rear legs connect to the seat. I now have a chair "in progress" that is all domino and it seems very sturdy.
If you are building a set, it would probably be worth your while to make a jig with a ramp that presents the chair part to the domino at 90 degrees.
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