Anybody got an over under estimate (or survey) of how many apps are being built serverless vs. container vs. traditional server vs. other?

For example, serverless is obviously the talk of the day, everybody appears to be into it. Twitter is abuzz but when it comes down to code deployed and services and apps shipped and running, where does it measure up? There are literally a gazillion COBOL apps still running these days, so, it's gotta be way more disparate between serverless, containers, and traditional servers than the *talk of the day* would have one observe.

Thoughts? Anybody know any surveys or polls or analysis being done on this? There's gotta be something right?