I'm still on whatever the cheapest kegland/king one is. It came to me well used. I made a larger hopper for it, which made it much more usable. The mill works fine except the times that it doesn't. Hasn't got stuck in the last 50kg though. Gap setting has not changed in 4 years, and my utilisation efficiency is about 95%, and im not having trouble with stuck mashes. Seems fine to me. Nothing about this is best practice.
If I was going to upgrade, I'd be looking for automation, but for the price of a spike I could employ a child from down the street, and pay for ubers to and from their house.
I can't get excited about a mill. Maybe I should buy a set of grist seives to show me how bad my grind is.