How one would understand a phrase:
But interesting all the same
What is it's usage? Really puzzling.
All the same is a common phrase meaning "despite what was just said." You use it when you are making a statement that seems to disagree with what you said previously. For example:
The movie was extremely long. But (it was) interesting all the same | just the same.
My daughter is very difficult sometimes, but I love her just the same.
This page has some a more complete definition and other examples: https://www.collinsdictionary.com/us/dictionary/english/all-the-same-just-the-same