I remember when Sonic Frontiers was going away, I had just bought much of their top of the line equipment and I didn't know if they were going to bought out or just close their doors. My Sonic Frontiers equipment was exceptional, and I kept it and upgraded all of it over the next 25 years.
When I was looking to replace my SF equipment I wanted something just as neutral in tube equipment, I now I have a REF 6SE, Am I worried, no. does it sound spectacular, yes! Will I hold on to this preamp for another 25 years, probably not I am not sure I will live that long.
But I do wish AR the best, I hope they survive this turmoil and come out even stronger.