Add a online cloud storage feature. Kagi has many products equivalent to google products (see: search, translate, maps, chatbot), with cloud storage drive being a notable omission.
Differentiating features for Kagi could be encrypted files, support for privacy pass to anonymously upload files, etc.
This is really just a web ui project (e.g. file browser, access management, universal document previewer) as the storage itself could be as simple as reselling Cloudflare R2. This aligns nicely with Kagi's talent base.
Storing files, syncing photo libraries from their phone, storing encrypted documents, sharing files anonymously.
Logged in users could use Kagi search to search in their drive as well.