For anyone wondering if the Idris book works with v2, I found this [0]. Some code examples in the book need adjustment to work in Idris 2. The Book is great fun.
Wow, I didnnt know they switched to chez scheme as the default backend for Idris 2. I know Edwin was impressed with the speed of Chez and the overall quality of the implementation, but I never heard about the switch to it as default.