I realized this after purchasing a Steam Deck. Initially I installed things like Apex Legends (rip) and Doom Eternal, but even with gyro and trackpads, it's just didn't feel great on a small screen. I will admit playing through the entire Master Chief Collection over various transits made my inner child kind of giddy. But Halo's chapter format and slow-paced combat makes it kind of an unique fit.
On the go I now mostly use my Deck for things like Slay The Spire, Ori, Okami, Hollow Knight, Tails of Iron, Stardew Valley, Baba is You, etc; Docked with a TV, playing the aforementioned FPS is fine. Or party games like Heave-Ho :-).
To be honest, I do kind of wish for a Vita-like, running SteamOS, with enough horsepower to run previously mentioned OTG games. Key factor is to be 'pocketable'.
> And that’s the crux of it. PSP seems to be designed for portable play only around the house. In that case I’d rather just have a regular console.
Sometimes the TV gets relinquished to the other half, in which case its nice to stil snuggle up instead of sequestering yourself to the study.