I largely ignored CarPlay since it came out since my car didn't support it and I didn't feel like I was missing much vs my mounted phone but recently I borrowed a car for a few days that had CarPlay and I really enjoyed it. So much better than anything from any car manufacturer and the integration was flawless. In fact, my biggest issue was figuring out how to get back into the CarPlay UI from the car default UI when I started the car (I'm sure there was an easy way and I took a convoluted way).
For a long time I said "Just give me keyless entry/start, bluetooth, and a backup camera and I'll be happy" but now I really want CarPlay as well. The car I was driving was much nicer than mine in a number of ways (adaptive cruise control, lane keeping assist, etc, all stuff I enjoyed) but CarPlay was the one thing I'd really love to have.