It was being downvoted because it simply wasn't factual. Android was not closed "from 2.x to 4". Honeycomb (3.x) was first released on devices in February 201

It was being downvoted because it simply wasn't factual. Android was not closed "from 2.x to 4". Honeycomb (3.x) was first released on devices in February 2011 and its source was opened in November 2011. 9 months is not a "really long time".