I think it's too early to even say if Floci will become something that people use so time will tell, but at AWS, they already had some "informal" support for localstack[1] and it's always been a "commercial product" (so you can imagine how controversial it must be internally to support a third-party clone). I'm only saying that a FOSS version is somewhat less controversial for them to support and although I would love for AWS to have something of their own they clearly have other priorities.

[1] https://docs.aws.amazon.com/prescriptive-guidance/latest/pat...