I think there's a real potential issue with Arther. When he says that he sees himself with his partner living together with Nick and Katchii and raising their kids together he's being serious. Meanwhile I think Nick sees it a a bit/joke and goes along with it on stream. This doesn't seem like the ideal future in the eyes of Nick and Katchii. They are probably looking to end up in a house just the two of them and potential kids. The way Nick probably sees his relationship with Arther in 10 years is similar to what his current relationship with Chance is, which is hang out few times/year. Meanwhile Arther probably sees them living together long term.

Arther needs a wake up call. He needs to realize this and come up with a plan for himself. He probably has around 1-2 years left with Nick. From there he has the potential to go two ways. He seems like he can work on establishing relationships and being a decent size streamer in Austin. He can also focus on camera guy/staff work for other streamers and I'm sure Nick and OTK would fully support him in that. He just needs to realize this, think about what he wants and slowly start working towards it.