You're paying $200 for a nice case and the 30 minutes you saved putting Kodi & Retro Pi on a $35 computer.
RetroPie's fun, and a great piece of software. Something faster than a Pi3 would open up more systems for reliable emulation, and access to x86 software simplifies a lot of things.
The audio is all software-decoded, but I think it can be configured for passthrough directly to HDMI, for at least some formats.
I'd say it's well over two hours over at least a $70 computer (including shipping and handling).
Where did you get yours, and how did you asses quality before purchase?
I bought two of these: https://www.aliexpress.com/item/Super-Wired-Game-Controller-...
Both my crappy SNES controllers still work to this day. I only put a usb extension cable between Pi and controller so i can play Mappy on my couch :)