This is not about stickiness. People complain because they liked the dead product. Do you hear complaints about Google+ dying? Reader wasn't a risk, it was a product people loved that wasn't hard to run. It was just too boring to maintain, didn't support the ad monopoly, and Google dropped it for the next shiny monetizable object.
Anyway, enterprise products are an entirely different ballgame where product support, and the reliability thereof, is measured in decades. The consumer product attitude is just a bad look, but things like the Railway incident are deal killers.