[2023] New client, muliple scapers in household but now as many devices/pc's

Hello. So today I was surprised with a semi forced update to the new login method. However, before I even want to consider upgrading to this how does this work when you eighter have multiple scapers in one house (brothers, sisters etc) or when in a relationship (my case) When upgraded you can't login via the normal/old way. But the new client you can't have multiple people linked towards it. So in the way how I understand this is that I won't be able to play at my boyfriend unless I bring my own pc? And that is not duable. (yes there is mobile but... Laughs in pvm) Because if I stay over for longer periods of time at his we just rotate his pc with him or me playing on our own accounts. How does this work?

Thanks in advance..

u/JagexDoom any clarity on this issue?