You just got sued

If you want to have a really great emulation experience, get a Steam Deck.

Nintendo has official emulators through switch online. They have a limited selection of NES, GBA, GBC, and SNES games available through the standard subscription, and N64 for the more expensive one.

It is technically possible to download ROMs of any game from any consle, and play in superior quality on a PC using an emulator. But my lawyer informs me that some part of that is a violation of copyright laws so you SHOULD NOT do that, despite the ease of obtaining and emulating ROMs of old games.

I am not a Nintendo techie, nor do I own a Switch. I only know how to use search engines, but that led me to this guide which has step-by-step instructions, including how to check if your Switch is compatible with the necessary exploit. It seems to be a decently involved process.

If you sucessfully homebrew your Switch, here's a list of emulators.

Can you rephrase that question?

whatever you do, do not install .nsps of any kind onto your modded switch. I backed up a ton of my games, and made the mistake of connecting to the internet without a dns blocker. sucks, 'cause I can’t play online anymore and have to use another switch for updates.