I suppose you can, if you want, define "communism" so narrowly that nothing counts as communism unless it brings about an early paradise of perfect plenty.
This is the canonical, traditional, classic, orthodox, and correct definition of communism in Marxism.
Imagine that someone tells Karl Marx...
I feel we're veering into the If my aunt had balls she'd be my uncle territory...
correct definition of communism in Marxism
I am far from being an expert on Marxism. But my impression is that what you say is at best an oversimplification. For instance, in the Communist Manifesto I find no claim that nothing should be called communism unless it successfully offers limitless plenty to all. I do find things like this:
In this sense, the theory of the Communists may be summed up in the single sentence: Abolition of private property.
and this:
...The Communists are distinguished from the other working-class parties by this only: 1. In the
How much money would it take to engineer biological immortality for at least half of the world's population, within 20 years, with 99% confidence?