The revamped version of Exercism looks amazing 😍 I think it's the best place to learn a new language and/or get some "deliberate practice" as a programmer.

Agreed 100%.

Man, I love Exercism. I'm unhappy that the cli interface is not the mandatory way to interact with the exercises, but the team recently assured me on Twitter that it won't be fazed out; so I guess it's win some, lose some.