Slow adaptation of KT150 by amp mmanufacturers


I am surprised that more audio companies have not jumped on the KT150 by now. I know there are several manufacturers such as AR, Jolida, Primaluna, Icon and Allnic that have amps that are able to use this tube but I thought more would have by now.

The vast majority of reviews from people who have heard the 150 have been very positive. Any info on other companies who may have something in the works?
bajaed
Jgottget - How would you compare these against the Silver 88s which also could use the KT150 tube? I know the Silver 88 is no longer being produced, however I'm sure there are still some dealer demos out there to be had...
I didn't get a chance the hear the 88's, my dealer only had the Mid Mono's on hand, which sounded really nice. The Mono 120's have bigger transformers and more power but a higher output impedance than the 88's. I had a similar time trying to find a KT-150 amp. Quicksilver has a good reputation and getting a new amp made for the KT-150's for $3,995 seemed like a pretty good bet.
Fear of KT150 update (formerly Fear of KT120 update): Stick KT150s in anything that can handle KT120s…or kt88s or 6550s it seems…my ongoing careful and utterly accurate thoroughly informal ridiculous survey has noted the reporting of exactly ZERO transformer failures or any other issues with the additional heater filament or any other alleged stress purportedly engendered by doing this. Be paranoid, be clinical, wait for the sadly overpriced updates offered by pretentious Mid-Western wire box vendors…but if you can't see 150s everywhere these days you're in an alternative universe. "But the amps made specifically for 150s are MORE BETTER"…of course they are…kaCHING...
Wolf you are right. I was curious about what else was out there/coming soon so I figured there would be a lot of amps listed that use the new tube.