Using housing from SWTOR as base for the housing system.

[Jeeqbit]

If that is the case, how would they avoid that problem?

I just explained how they would solve it. The exact details depends on their code, but I guarantee this: 13 years is enough time to learn to code and gain 10 years of programming experience. Moreover, programmers at a billion-yen company should be capable of achieving the feat.

Coding can be challenging, but nothing is impossible, and if SE ever says that then it is a mindset issue. Unreal 5's graphics are "impossible" yet programmers made it possible, because it is programmer's job to make things possible.