Marx would probably be an anarchist if he saw the world today
I've been reading some of Marx's writings lately, I always knew the basic gist of his beliefs but I wanted to be properly informed, or at least, I thought I did, the more I read the stuff he said the more I agreed with him!
Of course all the stuff about a transitional state didn't really sit right with me obviously along with every other anarchist on the planet but, as I recently read some of his last writings, he seemed to do a damn near one eighty!
After the Paris commune it seemed as though he'd woken up a new man, he wrote about how the means of production must not be acquired by the state but by the workers themselves, using them communally in a decentralized manner, he said that the army should be abolished and in it's position militias should exist to protect the people, he even seemed a bit more questioning of labour vouchers!
The only two "authoritarian" positions you could claim he still held were the labour vouchers and the "administration of things" which for those who don't know would basically be a radically democratic state with instantly recallable delegates that were meant to help coordinate the federated factories with each other.
But, you must take into account the circumstances of his time! He lived in an Internet less world were scarcity was still a problem, unlike Kropotkins and our eras after his,
That's what the vouchers were for! To encourage extra work to bring about abundance and to cut a few corners, even he himself said many times that he saw it as awful but necessary which in all fairness it kind of was at the time!
And on the matter of the administration of things, this was a time before the internet and our efficient ways of transporting goods and coordinating production, while even then I still don't think it was completely necessary, his viewpoint is very understandable!
What I'm trying to get at with these two examples, is that in our world both of these issues have been dealt with through the internet and the fact we're in a post scarcity world! He only believed in his things not out of some principle but out of necessity, if he saw todays world or even Kropotkins, there's a major chance he would have leaned more into Anarcho communism! Especially when considering how he was already rapidly trending toward that realization himself in his last years.
In short, cut Marx some slack, if he were here today, he'd (in my opinion) most definitely be an Anarcho communist