As others have mentioned, it's an officially supported feature and it's well integrated into ChromeOS itself. It's still "Beta", but it's now in a really solid state.

No, it's as simple as "Turn On Linux" in your Settings menu

Let me guess, the user cannot "Turn on Linux" in developer mode, the user must "sign in" with Google.

? You don't know what dev mode is. Yes you can of course turn it on in dev mode lol. I liked how you've been rebutted on every post in this thread.

Perhaps you would like to share a screenshot or a pointer to some documentation. Chrome OS forces users to sign in to run apps and use extensions. Sounds like this is no better than crouton or crostini.

This feature is Crostini. I now know you have either half knowledge or are intentionally posting in bad faith.

You don't need to turn developer mode on for this feature. That means you get verified boot , updates (including your Linux distro) as well as the security guarantees of Chrome OS. Crouton requires you to give up all of that. You can't get sync without signing in. Cloud sync is the foundation of the OS. It's what makes it stateless. If you don't like that it's not for you but stop spreading half truths about the product in bad faith.

I figured it was just Crostini.

Nope, it's just a toggle now.