He's saying that Kotlin is similar enough to Swift, but integrates far easier with the Android ecosystem and development environment, such that it's probably a better choice for a lot of people wanting to make Android apps with a modern "swift-like" language. I think that's pretty relevant.

You're doing that nerd thing where you're assuming we're divided into groups based on the technology we're using. We'd waste a lot less time if we simply tried to find the best tool for the job, rather than joining with a group and sticking with them blindly.