I’m the opposite, I sometimes find :w or :wq written in text files I have edited with non-vi editors.

subreddits are all part of reddit, there’s a top part that can decide over all subreddits and make rules and ban people etc. Lemmy does not have a central point of authority. lemmy.world can only make rules and control lemmy.world, lemm.ee can only decide over lemm.ee. If you want your own rules, you can make your own instance and be as valid and part of lemmy as any other instance. The main point is: there is no level above this that controls all instances. Each instance is the top level of authority for that instance, and anyone can create an instance if they have the knowledge and resources.
Another aspect is that technically you could also interact with mastodon, peertube, etc, but that isn’t seamless and there’s no consensus if it’s even a good idea to pursue that, but it’s technically possible.

This is the correct answer.

People seem to think that those who choose permissive licences don’t know what they’re doing. Software can be a gift to the world with no strings attached. A company “taking” your code is never taking it away from you, you still have all the code you wrote. Some people want this. MIT is not an incomplete GPL, it has its own reasons.

For example, OpenBSD has as a project goal: “We want to make available source code that anyone can use for ANY PURPOSE, with no restrictions. We strive to make our software robust and secure, and encourage companies to use whichever pieces they want to.”