In reply to Ben_Climber:
Things change.... Tonsai has/had something very special about it, but it also has/had its negatives. So long as climbing access is maintained, then who knows what positives the development might bring to the area? If it becomes less of a dirtbag paradise, I'm sure the dirtbags will find somewhere new. A few hours South, in Trang province, there is the potential for loads of development on or close to the beach. Railay has had big resorts for years and it hasn't really prevented people climbing there.
If I went back to climb on the Phra Nang peninsula I'd stay in Krabi and take a scooter/boat to climb. Also options of climbing on the crags around Ao Nang, including Spirit Mountain, Naga etc.