Unless you invested a lot of money and time, you are certainly already running an OS with a lot of BLOBs at the most important parts (WIFI driver, etc).

Given AOSP and a decent smartphone, I am basically at exactly the same level I am with running Linux on my desktop. Actually, the smartphone could be better, if it is a Pixel, because at least I’ll have 100% hardware support. … and again, AFAIK one will be able to run Debian in a virtual environment.

Long story short: I would never buy hardware with vendor lock in, but middle to high class Android smartphones are actually standardized hardware which run excellent with Linux. Total win for me.

To the best of my knowledge they give you a full Debian Linux in a container. Combine this with AOSP, and IMHO this is totally cool. Especially since my Netbook has worse specs than my current smartphone! :-)