Mark-Anthony Turnage’s opera Festen was too big to fail, and in many ways it didn’t. To be jazzy is to not be jazz, but, rather, be like jazz, and, crucially, be distant from jazz. Something jazzy is only ever partially so; music can be a bit jazzy, jazzy in parts, quite jazzy, pretty jazzy, or contain jazzy bits, but it can never be extremely jazzy, fully jazzy, or even jazzy full stop. The jazzy thing is a British thing, and, I reckon, a male thing, a relic from the age of the multi-talented TV showman. Jazzy music will be just fine.