Comment by gls2ro

For me I think there are only two major things happening between 2.5 let's say and 3.0:

- Keyword arguments - where there is no way around, you have to change them, upgrade gems...

- Everything else is optional. Code that is written in 2.5 mostly runs on 3.0

Also, I recently updated a Rails app from 2.7 to 3.0 and no code change is required.

I am asking as I am trying to use new syntax in my daily code so maybe I am missing something.

What is the new syntax that you discovered in 3.0 that made your head spin?