Honestly AirBnB used to be cool but now it kinda sucks.
Even though there's now a 'total price' option, booking a basic hotel is still less painful. There's cleaning fees and a lot of hosts have stupid requirements like you have to do the laundry or take out the trash or whatever. If I'm paying hotel level fees I want hotel level service. Plus every now and then you hear about one of these places having cameras in the unit. Fuck that.
A lot of people are talking about federation and access to admins. But what's missing is defederation policy.
Lemmy is a federated network of instances. If you're on InstanceA and you make a community on InstanceA, and I'm on InstanceB, I can connect to your community on InstanceA. UNLESS, there's a defederation- either InstanceA or InstanceB manually block the other. This is something the admins of the instance do.
Different instances have different policies on when (if ever) they defederate. Beehaw for example defederated a number of instances, but that's due to the experience Beehaw is trying to create- very inclusive and affirming and whatnot. That's their choice, but it meant defederating some of the more popular public instances (including lemmy.world).
//edit: Another thing relates to creating communities. Any communities you create will 'live' on your instance, and thus be under your instance's rules. Some instancess are friendly to questionable subjects like piracy and NSFW material, others are not. So even if you don't today intend to create any communities, it's good to be on an instancewhose rules align with your own preferences.