When I designed and worked on my tube preamp it went from 2 to 3 tubes per side then down to 2 then finally one 27 triode per side using an output transformer. The circuit if condensed into a solid state would be very, very simple but it is the right components and sounds better than any preamp I have ever heard. It took over a year to get it right. So, there you go.
I don't mind waiting at all for my amp if we knew that he is gradually building them and shipping out orders each week, but as we all know, communication is not Xin's forte.
The scary thing is that he may get one of those "Hey, this could use some improvement, let's see what we can do about that!" moments while he is building, and disappear for another X months without any notice.
You never know with Xin.