Although I know AWS is not optimizing for this use case, I see a lot of potential with serverless databases for things like open source, home brew style applica

Although I know AWS is not optimizing for this use case, I see a lot of potential with serverless databases for things like open source, home brew style applications where people want to own and control their data but don't want to pay for a monthly service. IoT devices could communicate asynchronously and store important data using just llamdba functions and serverless db instances. The first thought that came to mind was something like the bitwarden open source server. Currently, you can run a nano instance in the cloud that stays on forever but it needs to be maintained and it might go down occasionally. Additionally, it will cost you a few bucks a month assuming you need more than the single nano allowed by the free tier. With serverless functions and a serverless database you could have a central store without needing to run a full server. Cold startup wouldn't be an issue since you only need to sync to the server occasionally.