This solves the problem of showing what is relevant, historically we had a pageviews graph AND completed loops and showing both which took up too much space as the graph wasn't relevant in all cases but completed loops is as its the base value.
Being able to switch between completed loops and page views enables the best of both worlds in a way that if pageviews is the more relevant metric for a test the ability to switch to display that would have a big impact for some users.
The use case would be a user have a script with 3 steps instead of showing 100 completed loops per minute they want to see 300 page views per minute.
This is interesting. One follow up question:
In which use case would this benefit the user more than completed loops?