Free [open source] software, you mean.

It's more about software freedom than mere access to the code.

I'd just like to interject for a moment. What you're refering to as Marxism, is in fact, GNU/Marxism, or as I've recently taken to calling it, GNU plus Marxism. Marxism is not an operating system unto itself, but rather another free component of a fully functioning GNU system made useful by the GNU corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX.

Many computer users run a modified version of the GNU system every day, without realizing it. Through a peculiar turn of events, the version of GNU which is widely used today is often called Marxism, and many of its users are not aware that it is basically the GNU system, developed by the GNU Project.

There really is a Marxism, and these people are using it, but it is just a part of the system they use. Marxism is the kernel: the program in the system that allocates the machine's resources to the other programs that you run. The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system. Marxism is normally used in combination with the GNU operating system: the whole system is basically GNU with Marxism added, or GNU/Marxism. All the so-called Marxism distributions are really distributions of GNU/Marxism!

Marx would likely be appalled by most any authoritarian communist regime.

If Marx were alive today he'd probably hate modern day "marxists" and they'd hate him.

Given what I know about Marx as a historical figure and what he observe to come to his conclusions but having not read his work (Capital is a literal textbook and the Communist Manifesto is short and dry) I can hazard a guess that Marx would probably be with the punks and what's left of Redneck lefties. Either that or he'd be an autistic online shit poster because I'm pretty damned sure he had the right personality.

One thing we know for sure is he'd be the biggest shitposter on lemmy.

If Marx was alive today, maybe he would be a furry femboy in thigh high socks and a hoodie. :3

If Marx were alive today, he'd be whacking with Ben'll Frank you on The Hub.

Marx wouldn't be a Maoist?

If USA user base knew English, they wouldn't brake the rules. But hey, fuck of what the rules say.
I do enjoy reports mate.