The 2023 Nissan Z is the start of a new era for Nissan’s famous “Z” sports car. The Z starts at $39,990, and we drove a $53,655 model with a blue exterior and interior for a week.  Our car had flaws, but it was impossible not to like.  Loading Something is loading. Thanks for signing up! Access your favorite topics in a personalized feed while you’re on the go. download the app The 2023 Nissan Z has a lot to live up to. It’s the start of a new generation of “Z” sports cars, which — whether they become pristine restomods or cheap drift cars — are a staple of…