Most common switch due to VS Code being free and lightweight. Gain: fast startup, minimal resources, massive extension ecosystem (Intelephense, PHP Debug). Trade-off: requires extensive plugin setup to match PhpStorm functionality, less intelligent refactoring.

Developers frustrated with PhpStorm slowness switch for lightning-fast performance. Gain: instant startup, minimal resources, one-time $99 purchase. Trade-off: requires plugins for PHP intelligence, no built-in debugging, less code awareness.

Budget-conscious developers switch for free full-featured IDE. Gain: free and open source, good PHP support, integrated tools. Trade-off: slower updates, less polished UX, smaller plugin ecosystem than VS Code.

Full-stack developers switch for broader language support. Gain: PHP via plugin plus Java, Kotlin, JavaScript in one IDE, familiar interface. Trade-off: more expensive ($149-499/year), heavier resource usage.

Developers preferring open source switch to Eclipse PHP Development Tools. Gain: free, extensible, large community. Trade-off: heavier than VS Code, dated interface, requires configuration.