> The fact that you're tired of people complaining about Google discontinuing products tells me that Google may have a problem convincing people to adopt new services.
Exactly that, IMO. Arguably, people who voice their negative opinions are doing Google a favour by at least trying to draw attention to the problem.
It's entirely up to Google as to which products they create, operate and terminate. I've no argument with their right to do whatever they want in that respect - it's their time, money and resources which are being expended. But equally, it's users' time and effort being sunk in to discovering a product, learning about it, integrating it into their lives and using it. There are only so many instances of being jerked around that they'll tolerate before consciously swerving new products.
I think Keep is a pretty handy tool that's convenient and helpful. But I won't be using it. I relied on Notebook, until that was killed off. The lesson I took from seeing services being killed off that I or friends/colleagues used was that it's just a bit safer to use equivalent established services from dedicated providers. They might not be as tightly integrated with other Google services, but it's a trade-off I'll make for continuity's sake.