I'm about to graduate from UWaterloo now and have only had 2 courses with attendance - language courses. I really liked the option of going to classes when I wanted as I found that end up being on my laptop during class anyway.

Two CS courses(1st year) had a clicker thing going on where you had to answer questions and it'd be worth 5% of the grade. Some courses also had a key chunk of info taken out of the pdfs so as to incentivize going to class. I definitely wasn't a big fan, but it wasn't hard to learn about the topics from other university's notes available online