As of march this year the GMK queue was 170 sets and their average completion rate was 2-4 sets a month. At the optimal 4 sets a month, this puts the wait at 3.5 years. But, hopefully they finally get the second production line running.
I'm fine with waiting a year. Tooling, color matching, samples, shipping, logistics, and other related preproduction is a several month process after all. But going beyond 1-1.5 years is quite literally the sales management team exceeding their current production capabilities. I'd rather just see more sets with other manufacturers at this point is all.
I guess, for me, GMK has just become the "Maybe when it hits extras and I still care in a couple years" manufacturer.