yeah! Am I using the a better name for this? I thought of it as "DDD" but maybe I should call it the onion/hexagonal architecture in conversation from now on to make sure the right point gets across
I think that's not uncommon to happen, because there's definitely overlap in the communities/people talking about this stuff. Using/thinking in DDD tends to lead naturally towards onion/hex/ports-and-adapters (whatever you want to call it)
I think it's probably closer to the onion architecture, as DDD doesn't concern much about infrastructure. But it's kind of mixed up. You could also call it just SRP or separation of concerns.
I think the advantage of sticking to a specific "architecture" pattern is you don't waste time discussing where to put what, you just agree to one way and do it.