Earlier quoted context omitted.
From my point of view, if it's a choice between an ecosystem of tools that Google could kill at their whim and an ecosystem of tools floated and maintained by startup companies that could dry up and die at any time, it's a bit of an illusory choice.
Go for open source tools then. If they are good enough for people to get use out of, they usually stay around. At least I can't think of an example where one disappeared for good.
None of these are concerns with either Google's online offerings or the offerings of most startups.