No, if a substance change your mind, it's not alcohol and general awareness of the use has awoken, they WILL make it illegal. At least that is how it works in my country, but it seems applicable to most governments.

I hope the plants won't be regulated, but I actually don't think so. Even though the governments wants to forbid everything that can be used as a drug, they seem to be a lot more cautious about precursors/extraction raw materials with legitimate uses (thank god). The big risk here is if Ayahuasca enters the "mainstream", what before was considered as extraction raw material can now be seen as "drugs".