>unmodified original hardware
>modded out original hardware
>chink emulator devices
>hacked switch with retroarch
>laptops and gaming PC with emulators
I'm the king nerd so I have all of those things. They all have their own purposes. I have sort of a noah's ark for old handhelds and consoles, I keep one totally stock just like the one I grew up with, and then I pick up another one that I do a bunch of upgrades and mods and shit if available. The main reason I actually keep old hardware around is for the tactile feeling as well as the 100% authentic lag experience.
The tactile hand feel is huge for me, it feels so much better to play with the same feeling controller in your hands instead of some modern nu-shit like an xbox controller or whatever. You can technically play a SNES game with a playstation controller or whatever in that it has all the buttons but it just feels wrong, uncanny valley.
The other is the lag situation - some console games still have lag built-in (i.e. Super Mario World has two frames of input lag even on original hardware), but the main thing is you know when you're playing on original hardware and an original style display (CRT, CPLD LCD mod) that you're getting the exact same lag situation that the game originally shipped with. If I die on original hardware, it's my fault, I just need to get gud. If I die on an emulator, then there's always second-guessing how much extra lag the total system has and if the game is really meant to work difficulty-wise with a couple extra frames of lag (i.e. twitchy shmups). Retroarch now has some cool anti-lag features that are built in which are great, but then you can also get into autistic arguments with yourself over how much compensation you're supposed to use (since more always make you play better but at some point you're not just removing added lag, you're cheating).
but yeah. I play all kinds of RPGs and slow games on my chink emulator devices, fuck around with n64 games on my switch, and play 1080p+ gamecube games on my pc.
The gameboy screen mods are just kind of nice when you want to play Donkey Kong (1994) with the exact same bootup screen and comfy brick feel that you remember, just minus the squinting for good light and maybe the motion blur depending on the mod.