I lowkey wish Nintendo would rerelease the GBC or GBA I would buy one. They can bake in some games into a few cartridges and make it 100% worth the buy too.
You can buy the ModRetro Chromatic from the Oculus VR creator. It's better than anything Nintendo could ever produce.
You can pick a used one up for pretty cheap. Add a flash cartridge and you're done. I think the cheap android handhelds of the same form factor are a better option though.
I've still got my Gameboy collection, but rarely use it. It's just so much easier to fire up an emulator these days.