Shopping here isn't worth it. Things cost much more than street price (before duty free). You will still have to get to customs counter to get taxes back.
Security is operated by lazy people whose inefficiency would indicate that they're on special contracts making it difficult to fire them. Go for the Priority lane if possible.
Frankfurt Airport is Germany's largest aviation hub with more than 70 million passengers in 2019. More than 100 airlines fly to 275 destinations in 111 countries with approximately 1,400 flights per day.