i think the most accessible way to understand anarchism is to just think of how villages used to work:
There isn't really a big central authority, people just talk to each other and do what needs doing, if there's a problem you gather everyone and talk about it, and maybe there's a couple people everyone defers their judgement to because they actively trust them until given a reason not to.

A modern household is another example: the police isn't going to arrest you for not putting your toys away; everyone in a household is largely equal and if someone wants someone else to do something they have to convince them in some way, and yet it works fine!

Industry and anarchism are not mutually exclusive. There obviously would be very little industry left in a post-industrial, post-collapse world so I don't think that particular example is too relevant.

Anarchism takes no stances on the scale or level of industrialization of a society. Anarchist Spain had factories. The whole anarchist federation there stemmed from workers unions. Anarchism also does not mean a lack of organization or a lack of rules the way that "anarchy" is often portrayed by the status quo. It's just that the organization happens horizontally and without coercion.

If some place is fucking up the environment, then you organize on the regional level (delegate councils or however the system is structured) to lessen cooperation with the problematic community until they stop doing that.

Edit: If some neigbours continue to be dicks, then you can just go to war. Inb4 "Checkmate anarchists, killing fascts in the spanish civil war sounds a bit coercive!"

I think there's going to have to be a long drawn out transitional period both technologically and socially.

We'd probably need some sort of socialist state in between, and to replace corporations, and eventually other forms of private enterprise, with employee owned and ran co-ops.

You're right to say something as complex a chip fabrication would go out the window if we tried to do this overnight, but I'd like to think localized manufacturing will get us at some point in the mid-to-distant future.

Most of what I’m going to say here is stuff I learned/thought about a decade ago. I went to the Porcupine Freedom Festival (Porcfest) in college, the largest libertarian get together in the US (it took over a mid-size campsite for a week). What I learned was hardcore libertarians tend to be anarchists. A lot of what I heard from others was centered around individuals being engaged in their own governance.

In one case that was a blockchain voting system where a person essentially owned their voting registration instead of getting registered with the state. The more interesting one was a presentation that put forth that the best organized groups are in sizes of eight. Therefore the best government system would be a council system in which individuals sort themselves into groups of eight, then choose one of them to be part of a group of eight groups, and so on until a country has built up a national council that directly traces each member to every individual they represent.

Based on those I think what most anarchists take issue with in our current world (of the US) is that the government comes out every four years to say “hey, here are some people to vote for, take your pick.” It’s a lot more top down than it might look on the surface, and anarchists demand a bottom up approach.

If you want an interesting portrayal of hard libertarian/anarchist ideals, I recommend The Moon is a Harsh Mistress by Robert Heinlein, which is about a libertarian revolution on the moon.

I mean, pretty much you get a group of people together to buils/maintain/run the infrastructure because it needs done. As for the community upstream, have a nice chat and if that doesn't work, do violence. The most important part is setting the conditions so that a self-sustaining state or similar such group capable of enacting large-scale coercion or hierarchy is difficult/impossible