My impression is that Jay's channel is mainly organized around very very expensive gear; it's a Lifestyles of the Rich and Famous for audiophiles. If the GR stuff is not in that price category, I would expect that Jay loving it would be off-brand for his channel's character.
Jay's Audio Lab Visits GR Research's Listening Room
I have been saying this a while....If you can DIY a kit, have a tall ceiling and only have 5000 dollars, you could end up with some top tier sound with the GR NX-treme model.
Listening Session At GR Research
https://www.youtube.com/watch?v=PadaHLYgECs
I believe another youtuber/BACCH dealer, Audiophile Junkie, uses the NX-treme as his daily driver still. I am fairly certain he can afford some very expensive speakers, but, he just seems to be hanging on to the GR tall tower..
You never know, i suppose....Some of you may not end up liking the sound of some expensive item, you may very well prefer the sound of something cheaper, even if you can afford very expensive things.