My system runs the gamut between one man band outfits (Ayre, Symphonic Line) and big corporation (Revel, a Harman brand).
Is there a risk that someday I could find myself possessing gear that is no longer easily repairable? Well sure. But the bottom line is you can't 100% anticipate the future and it's an individual assessment as to how to balance it against the present. My feeling is I could get hit by a truck next month, and then it wouldn't make a whit of difference if both Charlie Hansen and Rolf Gemein both choked on chicken bones the week after my demise. And if the wheel spins in the other direction, at least I'll have had the opportunity to experience the pleasure their gear provides, if not for as long as I might have wanted.