Spring Boot Evolution: 1.x to 3.4 — What Every EM Needs to Know
·8 mins
Spring Boot is the backbone of most Java microservice ecosystems. As an EM, you’re not expected to know every annotation — but you should be able to drive the architectural decisions: MVC vs WebFlux vs virtual threads, Boot 2 vs 3 migration, observability strategy, and testing approach. Here’s the full evolution with the trade-offs that matter.