Write a 5-sentence article prompt that:
1) introduces Bush’s 2026 tour with Mammoth as direct support and notes the Stagecoach festival date,
2) analyzes how legacy bands stay relevant through new material and strategic co-headlining,
3) examines the tour’s economics, presales, and the role of support acts in audience development,
4) explores setlist strategy and fan experience balancing new songs with classics, and
5) situates the broader evolution of alternative rock touring, using Bush’s approach as a case study.