[danpalmer]

Microsoft has good backwards compatibility in general, but saying "you can't use Google Wave in any shape or form" isn't really true in spirit.

Much of the advance of Wave went into other products. Wave itself did not take off, but we have better chat, better email, better docs, all because of things pioneered in Wave. This is often the case with Google products disappearing, it's often because they've served their purpose and the technology has become normalised in other places.

Google Play Music is a good example of this. It was a technically capable product, but missing the market (in my opinion), and was turned into YouTube Music, a much better fit (again, opinion). Many product "deaths" are actually just a migration, or a recognition that the product is no longer necessary, and are better for it.

Apart from Reader. RIP Reader.