You did the right thing to stay for better conditions. You could have gone,
and with a lowered probability been just fine. But your risk level would
have increased, and everything one does in aviation should be to reduce the
risk level. Especially when still on the ground where the decision is easy
and convenient to make.

Ice takes quite some time to sublimate and can not be counted on as a risk
reducer. A thin layer can last for hours.

Karl
ATP ETC