I strongly disagree. It's just another step towards other open source apps taking over those two use-cases on alternative Android systems. AOSP is still open source, and maintained by Google. So this doesn't seem like a big deal to me, like at all.

I feel like people tend to really under-estimate the difference between "proper linux distros" (why "proper", btw?) and Android. Android was designed for smartphones, good luck catching up with "proper" distros.