Study: Google Featured Snippets Are More Consistent Than I Thought

The folks at RankRanger came out with a study around Google's featured snippets that shows that on average a featured snippet from a specific site will only be swapped out with a different site but it is rare for it to be swapped out to a third site. Even more, the dominant URL will show 77% of the time, as opposed to the second URL. This all means to me that featured snippets and their placements are more consistent than I thought.