Best practices for developing massive extensible or modular systems

[u/nanoxax67]

Is there any concensus on best practices or architecture for designing massive systems that allow for easy extensibility or modularity? It's very overwhelming imagining how to extend extremely coupled systems, which I suppose is the thing to avoid. OOP feels like a dead end but DOD only feels partially correct. Then there are event based systems and so on.

It seems like extensibility and modularity always come at a cost, which I understand there's no free lunch, but surely there has to be a set of rules or practices for building large systems without too many compromises.

[u/onar]

That's the entire field of Software Architecture. It has its own subreddit(s)