Ten years ago, Yellowcard couldn’t go on. The Florida pop-punkers, known for their 2003 platinum-selling album “Ocean Avenue,” were exhausted from constant touring and had fallen out of favor with the discerning rock world, unable to fill even small clubs. The group began its indefinite hiatus in 2017 and by 2018, frontman Ryan Key was shredder for hire, playing faceless rhythm guitar for genre buddies New Found Glory to keep his rockstar dream alive.