I would say the software industry’s long running undercurrent of libertarianism and anti-worker/anti-collective action is a bigger deterrent to co-ops not forming there.
For an example that does exist there, see Motion Twin.
I’m aware of the Peter Thiels of the world and (prior to that, Bill Gates) and so on, but it’s also where FOSS lives and Open Source itself is a collectivist process, albeit a very slow one in most cases.
The lack of co-ops is (IMO) more likely due to timely processes related to decision making. New code can be deployed instantaneously, but direction and all the bells & whistles all take time and it’s just about impossible in a traditional heirarchical organization. I’d expect if there was no single entity making decisions it’d take even longer to do basic things.
