True, but currently prostatectomy is the most common intervention and second is radiotherapy which as mentioned in a comment above is a very expensive alternative with known side effects.
Histotripsy is early in its clinical life but I wouldn't say untested.
Urinary and erectile function are a major issue with partial and radical prostatectomy. These ultrasound treatments are showing significant improvements in both areas.
This technology is also now used to treat non-cancerous prostate enlargement (BPH).
My <2yo son started excitedly pointing out birds flying by a kitchen window at home so we placed a feeder on the glass and he loves when they eat while he's eating. Then I found this app to start to try and identify the different frequent diners together. Was amazed at how well it worked even through the screen on the window.
Histotripsy is early in its clinical life but I wouldn't say untested.