[YayamiOmate]

What are you talking about. This whole situation is a one great counterexample to your 1).

Making any company a single point of failure is a bad idea. You are basically giving up your freedom of choice for maybe some convenience, but don't confuse it with guarantee of sustained service.

[MichaelApproved]

I'm talking about buying a single brand of product. Not buying things that are compatible with that brand, buying specifically just that brand.

[TeMPOraL]

Again, unless that company has a great track record, you'll probably get screwed rather quickly. Google is not such company, for example. Also, any startup is out of the question too; half-life of VC-backed SaaSes is on the order of a year or two.

IMO buying any hardware tied to a SaaS is a dumb idea.