For example like Ethereums dapps, would love to know how the experience was developing and maintaining the app. Costs compared to traditional hosting etc.
While you can host web assets on IPFS, you will find the UX too slow (latency is high in these systems). Use a CDN like Cloudflare.
The costs are typically greater than regular apps, because you still have to develop the regular app, and also a smart contract + more security auditing. Additionally, finding devs for blockchain is even harder, for several reasons.
Recommendation... skip the hype, start from a problem, choose the best way to solve it, and build something people love.