Well as a boarding school survivor, I can definitely say that I would contemplate it under the right (extreme) circumstances. I'm so glad to hear your DD is loving it, I hope she is able to thrive long term too.

It sounds like your DD was pretty much "out of your sphere of influence and protection" courtesy of the company she was keeping, so a very good idea IMO to make a clean break. I"m sure it wasn't an easy decision for you . Perhaps she will appreciate "home" more too when she returns, rather than taking it (tediously) for granted, kwim? It will be interesting to see whether she relates to you differently once she has spent a little more time outside the nest.