还是。。。吧 to indicate preference after a comparison

Question 1

What is the function of 还是。。。吧?

Answer 1

To indicate one course of action is preferable to another, often following the 还是-alternate question construction.

Question 2

Taking a plane is too expensive, let’s take the train.

Answer 2

坐飞机太贵了, 还是坐火车吧。