>That's a gross exaggeration. C64 OS doesn't cost "huge amounts of money". It's $59 or $64, depending on which package you buy. And that's in Canadian dollars, not the more expensive US dollars.
That's a lot to pay for 8-bit software these days, especially when rival OSes such as GEOS are free (and have more apps available).
>At the very least, C64 OS is a fun demo, meant to dazzle you, your friends, retrocomputing show attendees, etc.
That seems an odd use case; there are thousands of cracktros and other demos that could be used for that.