Most architectural problems are boundary problems. Knowing where to draw the line, and when to redraw it, is one of the hardest parts of building software systems.
Choosing between modular monoliths and microservices is not about trends, it is about timing, team maturity, and understanding trade-offs.
Software architecture isn’t a fixed design or a set of diagrams, it’s the evolving set of decisions that guide how a system behaves and grows with its team.