Traditional stateful inspection firewalls have limited visibility into the Web-based network landscape. Gartner predicts next-gen firewall will comprise 35 percent of the installed firewall base by the end of 2014. Next-gen firewall adoption was between 5 percent and 10 percent of total firewall appliances in 2010, according to a joint report by Infiniti Research and TechNavio Insights. The business case most often relies on savings and reduced management overhead that come with consolidating several security products into an integrated platform.”]
Source: https://www.csoonline.com/article/2129875/next-generation-firewalls–in-depth.html