Memes

FOSS isn't communism, Foss hasn't eliminated class relations. Using an free open source library to make more money for your boss isn't communism. While I love FOSS, it's definitely not communism.

Marx never said people aren't nice and don't give things to each other under capitalism as far as I know, where are you taking that from?

And the existence of FOSS is reliant on a few key sectors which capitalism could very well destroy or mutate into something much different than what they are now. I don't see far-fetched the idea that the entire physical infrastructure of the internet will one day be privately owned, and companies will be able to decide who takes part and who doesn't, what kind of content is allowed... The fact that the capitalist overlords still haven't eliminated it, doesn't mean they possibly can't.

he was wrong about it being necessary to destroy capitalism before this happened

I thought it was more that (using modern terminology) he viewed socialism as an emergent phenomenon that would arise due to the unresolved contradictions within capitalism. So socialism doesn't require the destruction of capitalism in order to start, it's more that once it emerges, it'll supersede capitalism. The Leninist approach of destroying the old order, then building the new one at gunpoint didn't work all that well (to vastly understate), leading to a long period of totalitarian state capitalism, where workers had no control over the means of production (which is the main attribute Marx ascribes to socialism) and degeneration into nationalism, imperialist nostalgia and cronyism.

But so far, along with failed revolutions hijacked by totalitarians, the main thing we've seen is that spontaneous emergence of working, non-coercive socialist organizations such as co-operatives has been met with strong and sometimes murderous opposition from the incumbent capitalists.