I wish there existed:
A chrome extension to limit infinite scroll on social media to reduce content addiction!
A gym that increases your monthly fee based on how frequently you go.
Cosplay for hospitals; we need more of that!
Generic caching proxy as a service (for using as a wrapper over rate-limited APIs).
If you end up making one of the above or know that it exists already, do let me know! I'll be quite thankful. 🙏