I use Tidyverse a couple of months for now and just want to be clear with my understanding of best practice with split-apply-combine approaches. I used group_by() + do() approach and was satisfied somehow. But I wondered when I saw, that do() is basically deprecated https://bit.ly/2T1LdWn. Then I found this blog post https://bit.ly/2PkUHO5 where author describes purrr approach (a couple of them). Also on datacamp a new course was released - ML in Tidyverse, where a purrr approach is preferable. But it seems like group_by() + do() still in use.
I am confused. What approach should I use, why so and what if i'll be more conservative with group_by () + do()? At least, it has a progress bar.