the majority of neurosurgery residency graduates are entering into private practice year after year. in private practice, you are usually doing around 80% spine (usually elective) and 20% brain. a lot of elective spine is often done on an outpatient basis.
from my observations, the Cushing-esque neurosurgeon is dying for several reasons. like i already mentioned, spine surgery has been a big reason for this. spine cases involving any hardware implantation were once almost lost to orthopedics (or stolen from orthopedics depending on who you ask). over the last decade or so, however, neurosurgery residencies have incorporated spinal instrumentation into their curriculums producing surgeons capable of handling all aspects of spinal surgery above and below the dura. the amount of spine cases that exist out there are limitless. if i recall correctly, the laminectomy is the most common surgical procedure in the united states. it is entirely feasible to build your whole practice around elective spine. in a sense, spine surgery has given the modern day neurosurgeon an out for a more lifestyle friendly career.
endovascular procedures have also made neurosurgery more lifestyle friendly. a lot of the aneurysms that neurosurgeons used to salvate over are now coiled in the endovascular suite. a relatively recent paper has produced pretty damning evidence to coil the majority of aneurysms although a lot of traditional neurosurgeons still make compelling arguments to clip certain aneurysms. irregardless, endovascular is the future for a lot of the cerebrovascular diseases (including AVMs) that were once handled in the OR. an aneurysm in the endovascular suite takes half the time to coil than it does to clip. plus the post-operative care is a lot less complicated and usually less time intensive.
radonc has become a lot more involved in taking care of certain brain tumors.
automobiles have become much safer. statewide seatbelt laws have become more prevalanet. more states are requiring helmets on motorcycles/bikes.
i would never call neurosurgery a "lifestyle specialty", but i certainly think it has made strides over the last several decades (and a lot over the last several years). the data posted above may slightly under-report the average number of hours worked by neurosurgeons based off my anecdotal observations.
it's an amazing field. tons of variety and many different ways to set up your practice in the future.