Feel like there's now a lot of modern software that can do particular things well but there is new promise in finding universal abstractions that can ideally run recursively / safely run any software at their leaves. (Unix + tooling is most of the way there ofc)

I feel like Docker Compose / K8S / VM / Dagger.io layers are close but can't quite always recurse flexibly and aren't always simple to run with. Networking / devices / auth are often awkward choke points