Ever since I learned how to integrate Enhanced Input into my projects, I’ve found it impossible to go back! It’s more involved and takes more work to set up than the default input system, but it’s absolutely worth it.
For me, one of the biggest benefits is additional options/flexibility for gamepad controls. if I wanna have actions that require holding a button, simultaneous button presses, all sorts of stuff…it’s way easier than trying to hack it together using Blueprint nodes alone.
I see you folks are also talking about CommonUI…I love it when it works, and utterly despise it when it doesn’t 
Still, it’s been my best (non-Marketplace) option for universal widget interaction with different input devices. I’m not very experienced with UI stuff, so I’m only using the ActivatableWidgets and WidgetStacks for now.
There’s a bug in UE5.1 that keeps putting my CommonUI widgets at the top-left corner of the screen, and I really hope it gets fixed in the next update. Some people have found workarounds, but they haven’t worked for me so I’m waiting.