Please remember this is still ablitive brain surgery.

A scalpel isn't used, but focused ultra sound is cutting tissue. Pallidotomy and Thalamomy are the types of surgery. Both were commonly done until DBS become popular.

With DBS you can fine tune things, or even remove the electrodes after surgery. Infection is always a risk, but DBS allows for complete reversal.

With focused ultrasound ablitive brain surgery, no risk of infection but you just hope no errors during surgery as there is not chance of undoing it

For Parkinson's, I'll stick with DBS. For my cancer tumors, I think focused ultrasound is fantastic way to go.