If it makes money (or some equivalent) then you can’t own it. Parents aren’t necessarily, if you’re supported so that you can invent for the betterment of society or for fun.
Dictatorship of the proletariat is supposed to be a temporary phase, but it is a fundamental weak point in the transition to communism that I think cannot be overcome, because once people get that power, they won’t be able to give it up (or they’ll be removed by people who don’t want to give it up).
So I consider communism sort of an unattainable ideal that we should strive towards rather than actually considering implementing irl.
Marx believed in the natural progression of economic systems, from feudalism to mercantilism, mercantilism to capitalism, and capitalism to… well, something else anyway. Socialism, communism, fascism, and really any of the other isms that came about in the late 19th and 20ths centuries were meant as post-capitalist systems. Marx of course was a proponent of socialism or communism, but it’s not a foregone conclusion that one of those will be the preeminent system after capitalism.
Anyway, my point is that the USSR et. al. were too early to the game. Capitalism hasn’t yet run its course naturally.
