I left because numbers plummeted and my guild died. I don't think there is any way to change this.
I actually did like
UO as a game but a lot of the stuff I was doing when not RPing was based on supporting my RP characters and guild, so feels rather pointless now.
Still, I never did download KR, and don't like the idea of 2D being phased out. I'm not that interested in graphics (so long as something looks recognisible, that's good enough for me). I still enjoy playing back through stuff like Baldur's Gate and Icewind Dale - the better graphics have got, the more shallow and lacking in narrative depth games have become.