There's an element here of being led to the proprietary stack only because of paper-cut UX considerations. They aren't going micro-budget here - which they coul

There's an element here of being led to the proprietary stack only because of paper-cut UX considerations. They aren't going micro-budget here - which they could do, by simply eliminating all the equipment and doing the show a capella - so much as they are looking for impact for money, which means something that works reliably for the current talent pool in live scenarios. Audio on Linux can definitely work well, but other comments here mention Mainstage as the live performance software driving this decision, and offhand I can't think of a comparable app on Linux; you'd either live with different/worse UX, or have to code up something, which is not really in the scope of the quoted budgets.