Competition is good, but Fly.io has proven problematic based on my two years of production experience. Anyone requiring reliability, professional support should avoid using services with significantly less experience than their competitors, such as S3, Cloud Buckets, and R2. Personally, I do not trust any service that relies on Fly.io. This perspective may change, but so far, they have proven to be an unreliable partner.
Stay away from Orientdb it is a super hyped multi-model database but it's unreliable and hard to maintain. I worked with it for 2 years incl. paid professional support.