MR RED, I don't discover this problem now, it was the same for the caves too.
But do you know how it is? You always hope that the Developers realize the wrong choice and in later versions implement the possibility of using the new biomes in the already existing ones. I don't know about you, but personally starting all over again after building and visiting a lot means playing the same game twice. ok early game, but take for example Raft, a beautiful game, also in early access, which gave the possibility to play the following patches starting from the previous one and not losing any of the progress already made. Many other games allow you to do this.
However, it is useless to dwell too much on the question. I certainly won't finish it, much to my displeasure, also because I found it beautiful, instead people like you will surely decide to start it many times because it doesn't create problems for them, in fact I read some comments from players who have done it many times to discover different maps...