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. To me, that seems much too narrow a definition.
Imagine that someone tells Karl Marx that the economic system he advocates will not bring about a permanent end to all kinds of want. Which is the more likely response, supposing he believes them (of at least is willing, arguendo, to stipulate that they're right)? "Oh, then it turns out that what I've been advocating isn't communism after all" or "Oh, then it turns out that communism doesn't work as well as I hoped"?
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...
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?