Monoliths, Microservices, Distributed Monoliths, Domain Driven Design (DDD), Service Meshes, Data Modeling and more. All in the latest Software Architect's Newsletter.
Personally, I like DDD, as it helps with system decomposition, isolation, reducing coupling and cognitive load, and generally gives developers more freedom inside their domain because the boundaries are clearly defined. This is especially important when you're out on a sea of uncertainty. Anything you can do to bound the context you're working in lets you focus more on what you're trying to get done and not have to worry about what others are doing.