My 2015 CT is now on 116,000 miles. It's Essential maintenance all the way for me now simply because it includes the all important hybrid check.
In fact is was serviced yesterday and passed with flying-colours (with the important stamp in the service book too)
Any peripheral stuff like plugs, gearbox oil, wiper-blades to be picked up by me or my trusted local mechanic as needed!
A cost effective and sensible way of running a car I would say!
SJT