Anarchism and Marxism describe dramatically different vulnerabilities in capitalism which in turn imply dramatically different strategic orientations toward the world.
If raw economies of scale are the deciding factor in struggle, then meaningful social change can only come through proletarian uprisings or movements of sufficient size. Hence anything that isn't building up working-class institutions and/or The Party is a waste of time.
But if capitalism is riddled with inefficiencies and potential exploits, then actively being able to search through them to find critical points of leverage is far more effective because it enables force multipliers and attack vectors which can give you capacity on par if not exceeding mass movements.
I feel like this point did not come across that well in the text, but thankfully it was summed up at the end. One thing I like about some "classical" anarchist texts is that they really hammer down on each idea with sometimes multiple times stating their point from different perspectives or with multiple metaphors.
Also the text might not be as accessible for those without some IT knowledge, but for me that was actually perfect.