@Jade Zheng Part IV and V, especially: abstraction, orchestration, and cloud compilers. Full disclosure, I haven’t finished the book yet. I just happened to come across this post just after reading about crossplane and seeing Winglang recently, too.
To answer your question about direction, I think it makes sense in delegating ownership of the service to the engineer by empowering them to manage the full lifecycle without the cognitive overload. My biggest concern would be making sure the target platform has all of the other concerns covered: security, observability, cost…