The past few years have proved to be a test of faith for Hold Steady devotees. Mustachioed keyboardist Franz Nicolay peaced out in less than amicable fashion. Frontman Craig Finn announced a solo album. Guitarist Tad Kubler appeared in the latest round of press photos, minus about 75 pounds. Can the greatest bar band in the world hang on? Or will life on the road and the members’ advancing ages ultimately do them in? I say they’ll bounce back, and this non-headlining gig at the Midland — far from ideal circumstances for Hold Steady appreciation — will still totally rock. But those are the words of a zealot. I’d follow Finn and Co. into the fiery depths of hell.