I can't think of any valid reason for a person with sane mind to do this. Yes, macOS is somewhat closed, but it's definitely more open than ChromeOS.
Well, then you can only put it in dev mode and use chromebrew. Which I am glad exists, but even installing node can be a pain and the way to get it running changed over the years.
In other perspective, ChromeOS supports running Linux apps w/ GUI without much differences. You just open your terminal, type `apt install XXX`, then `XXX` should work out-of-the box.
I don't see any reasons that ChromeOS is less open then macOS
I don't think that's entirely true. For instance, ChromeOS supports Mesa, which macOS has spent the past decade pretending doesn't exist.
What concrete points makes you put macos as more open ?
Other than that, it's perfect! (On the blance,still better than any other laptop)