I was told by a leader and pioneer in the radiotherapy space that he believed that in 10 years we would view radiation therapy like this, caveman technology with a big blunt hammer.
He believes biologics will take over.
If you dig into them, radiotherapy is largely archaic 60s and 70s technology other than a few shining g stars like Proton Therapy, etc.
Look at the gammaknife for God's sake: https://en.m.wikipedia.org/wiki/Radiosurgery
Even the big fancy new Cyberknife, etc. were all designed and architected decades ago and are relics of another age.