The quote you mention doesn't seem all that different from other companies building paid-for dev-tools that help their userbase in ways not directly related to their project.
This seems similar to Vercel putting out articles about how they make next.js better, when it's obvious that the integration to their system is how they make money.
Great work with Next!
Vercel hasn't created an IDE for NextJS, and you are free to run NextJS in Cloudflare.
They also don't actively collaborate with an OS vendor to replace an existing language, stagnated on purpose, to help sell Kotlin.
I am curious about the "actively take options" part. Other than not allocating resources towards language support in other editors (which is the one thing I remember hearing before), what other actions have they taken?
I would say that Vercel has specific enhancing functionality to make using NextJS "better" than self-hosting it. That seems somewhat similar to me.
Checking on kotlin, it has a foundation, with Google being one of the backers, which seems like a fairly decent way to advertise that it's not completely locked-in.
Also when you say "actively collaborate with an OS vendor to replace an existing language, stagnated on purpose, to help sell Kotlin", are you implying that they are somehow responsible for holding-back and stagnating java? That seems like quite the claim. Java seems to be getting more modern quite rapidly with it's new release cadence.
What a wonder that Google, number one reason Kotlin matters at all, seats alongside JetBrains on the Kotlin foundation.