The Vue 2 to Vue 3 migration is incremental. We use the migration build to run both versions simultaneously. Changes include updating v-model syntax, replacing filters with computed properties, migrating from Vuex to Pinia, and refactoring options API components to composition API gradually. The process typically takes 2-4 weeks depending on application size.

Yes. Vue 3 has first-class TypeScript support. We use defineComponent for type inference in components and script setup with generic props. Pinia stores, composables, and utility functions all receive full type coverage — catching errors during development rather than at runtime.

Absolutely. Vue's progressive design allows you to drop a script tag into an existing HTML page and start using Vue on a single component. For larger integrations, we mount Vue applications on specific page sections while the rest of the page remains static or uses other frameworks — enabling gradual adoption without full rewrites.