I really think we should stop using term "ecosystem" as we do it now in tech (but corpos really want us to, so, that doesnt matter ha-ha). See, ecosystem is complex and interconnected with universal rules and resources. There is no this ecosystem, and that ecosystem, only THE whole ecosystem.
And for that quote-quote "ecosystems" tech companies want us to believe the term "terrarium" or something like that fits better. Cause they want that to be as isolated from "the whole ecosystem" as possible, being perfectly controlled predictable environment, where you cannot do anything beyond the limits they have set.
Those terrariums are somewhat connected to the whole ecosystem though. Just like terrarium is somewhat connected to the ecosystem, through the people maintaining it, still being as isolated as possible for those who lives inside.
So that term is just misleading. Yeah, we cannot just snap our fingers and change the language, but it wouldn't just change itself either.