Google open source stuff, true, but their development practices leave much to be desired, and in some cases seem designed to limit the usefulness of the source.

Google open source stuff, true, but their development practices leave much to be desired, and in some cases seem designed to limit the usefulness of the source. Chromium source is a nightmare to build, and requires random, specific versions of the opensource components, or sometimes incorporates requires Google's own forked, slightly different and broken versions. Android source is becoming less useful as a viable OS replacement every version, as so many apps are tied solely to the Play APIs.