Is it a good idea to replace my adopted family with my birth family?

That's up to you. Perhaps if your adopted family hasn't been good to you and your birth family are better people or perhaps not if vice versa. Maybe both families are decent, but you have you reasons for wanting to put one over the other. Only you can answer that.

Only if there s something wrong with your adoptive family. At best I'd guess having both in your life would be optimum.

"Replace"... I can't imagine how it would be. Supplement, maybe.

Honestly, I can't imagine even considering another option

Why?

Not understanding why that would be necessary and room can’t be made for both.

Not if they were good to you.

You don't have to replace them

Why would you want to do this?