HoloX house timeline, from my recall of clips and streams:
- Sakamata's grandma passes away
- Lui and Sakamata discuss living together and turn it into an on-stream bit
- In later streams they both pump the brakes; "haha ok but fr it might or might not happen"
- In April Lui says offhand in an English zatsudan that they would live separately. At the time she was talking about cats vs dogs. Sakamata has a dog and is allergic to cats. Lui would like to have a cat and seems traumatised by dogs. I doubt that's the only or even a major reason they chose not to cohabit, but it's there.
- Sakamata moves into the haunted house. Lui has not (yet) moved to my knowledge.
About the haunted house - Sakamata has claimed that mane-chan has been to her house and was also disturbed. Ask Towa how invoking managers in your kayfabe works out. Regardless of whether there's a natural explanation for the haunting, the simplest explanation for the way Sakamata has been acting is that they all believe it (Sakamata, mane-chan, and Lui when she stayed overnight). Remember they are Japanese.
I'm just happy I can listen to whale song again.
To answer seriously: more life experience. So they're more socially adept (e.g. Botan's thoughts on Rust) and have a different range of stories to tell (e.g. Botan's griefing in Rust, Vesper's plastic ball). Age also adds a layer of comedy when they act like dorks (see above; see also Vesper's dad jokes and boomering his way through Twitter). I mention Vesper because he's an EFL example of a hag, albeit male (hence oji love).
Adding on to this with something I said the last time masterstocking asked if anyone knew how Uto was doing. At least Nakiri-gumi know that Cover or the Holos would speak up if Ayame was in actual danger of not coming back. Pikamee and Ironmouse and Pomu also have associates. Even Kson had a manager (pre-VShojo, and she still retains her services). Who does Uto have? If she doesn't have anyone she can trust to speak on her behalf, that needs to be fixed, regardless of her (justified or unjustified) paranoia.
