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Logically, you are correct. Whether you're looking after one key or four the actual process is the broadly the same.

However, if you're aiming for any sort of adoption at scale, you will be trying to encourage non technical folk into the ecosystem. The idea of being able to spin up specific communities for what could be small interest groups (and also affiliate them) is very cool (it's already sent my mind spinning off with possibilities in terms of community). But your audience will change. And it's their perceptions that will come into play. Regardless of what the actual, logical approach is - how they feel about it will inform their decision.

Mrs. Miggins runs the cat sanctuary in the village and wants to keep in touch with her benefactors, and also maybe earn a little bit of extra income to help feed the cats. She's heard of Hive somehow, and can see that it could help her do both. She's no techy, but can find her way around Facebook. Just about. Even though she often posts a story when she means to post to the news feed.
She could quite easily be phased by 4 complex keys coming up. She could handle one, as she'll equate that with a 'normal' password. But four?
"Why are there 4? I only have one password for everything else I use. What do they do? I understand posting, I think. But what does active mean? Why is one called owner? Don't I own them all? I don't understand this. And if I don't understand, most of the people I know who I want to use this won't either. I'll stick with Facebook, everyone knows what's going on there..."

OK - I'm making the scenario fit the point - but I've come cross this in multiple places in the crypto sphere. Some awesome ideas and some incredible dev work - but the UX can sometimes be -er- challenging. 😉

I agree with your points about Mrs. Miggins. The difference being that she would be far better off if you simply handed her the posting key and told her to treat that like she does her facebook password. Also, let her know that once she accumulates some significant value in her account, she will need a different password to allow her to manage those funds. This is far better (imho) than giving her a single owner key that does it all (because of the risk that she will treat it like she does her facebook password and when it gets hacked she has lost far more than explaining to her friends why there are lewd posts on her facebook page).

Once she gets to that point (of having real value tied to her account), she will then recognize that the 'money password' needs to be more tightly controlled than the 'posting password' (and thus will be ready and willing and informed when it comes to accepting custody of that key).

Yeah - that makes sense to me. The language you use there is really good too.

Trying to put myself in Mrs Miggins head (there's a lot of soft sofas and fluffy cushions. With cat pictures on the wall), having a posting password that lets me manage my community, and then a separate money password to manage my funds not only feels understandable - but sensible.

👍