Google is using
anticompetitive
measures to prevent the manufacture of devices that are sold with
any forked version of Android.
(The crucial point is on page 3.) This is even more important than
the steady replacement of free apps with nonfree.
The important aspect is that includes any free version of Android,
such as
Replicant. This is not quite the
same as the way Microsoft abuses its power in the PC market, but it
has comparable effects.
Of course, if you want freedom, you shouldn't use any of the Google
APIs, and Google Play (offering so many nonfree apps) is something to
run away from.
The article talks about "open source" rather than "free/libre
software", seeking as usual to avoid
ethical
opposition to nonfree software. Please don't imitate that
practice! The way to encourage other people to think in terms of
freedom is to raise the freedom issue visibly whenever it is relevant.