This is a clear case of "Build Something People Want".
After all it was requested almost daily over at x.com
https://x.com/search?q=ai%20bring%20clippy%20back&src=typed_...
Actually this is a good way to find product ideas. I placed a query in Grok to find posts about what people want, similar to this. Then it performs multiple searches on X including embedding search, and suggested people want stuff like tamagotchi, ICQ etc. back.
I feel like these are all great examples of things people think they want. Making a post about it is one thing, actually buying or using a product, I think the majority of nostalgic people will quickly remember why they don't actually want it in their adult life.