Anecdotally, my Switch 1 copy of the Spyro Reignited Trilogy has a little warning on it that it requires a download (IIRC, only Spyro 1 was included on the cart). But I don’t know if these warnings are common or required.

I think Wipeout was probably the progenitor of this - the entire pitch of the game was basically “Futuristic racer set to techno bangers”, and a lot of other games followed suit with their soundtracks.

Check out Sean Seanson’s PSX Club Mixes for some absolute bops and a nostalgia hit.

They don’t exclusively do retro stuff, but Digital Foundry’s DFRetro series is brilliant.