Add in a fold, and some folks could probably live with a single device across all use-cases, and it'd simply be better because of not needed to sync files.
It might not be good, but not because the idea is bad.
If you have Termux, you can do even more, like run a VM for a sandbox dev environment. No cloud required.
Android in desktop mode is far more useful and less locked down than Chromebook. As usual, Samsung has led the way in making yet another Android feature viable, as Google tries to catch up 7 years later.
My chromebook (framework) has 64gb of ram and 2tb NVME and thunderbolt 4. It also runs containers, vms, vms inside vms, windows vms, macOS vms, AND Android apps from the play store.
Only thing missing is PCI passthrough from thunderbolt enclosure
I tried running Android apps on a Chromebook. Even something as simple note taking (Obsidian/Logseq) didn't work properly because it could not save a text file into local storage. That was over a year ago, so I don't know if things have changed.
On 2019 era phones probably not, but on recent flagships with >8GB of RAM and latest Qualcomm SoCs, and UI desktop enhancements like Samsung's DEX, definitely. Except nobody knows about it.