Why is PS Vita not popular?

Can you explain why the PlayStation Vita has struggled to gain widespread popularity despite its advanced features and capabilities? Is it due to a lack of marketing, competition from other handheld gaming devices, or perhaps consumers simply favoring more traditional gaming consoles? Additionally, how does the Vita's limited library of games compare to other platforms, and has this impacted its appeal to gamers? Understanding these factors may provide insights into why the PS Vita has struggled to capture the market's attention.