Angular

v0 strictly outputs React components and Next.js-compatible code only, forcing developers using Angular, Vue, Svelte, or other frameworks to perform extensive code conversion. The tool also mandates Tailwind CSS and doesn't generate TypeScript by default.

Some frameworks push proprietary patterns and abstract so much from developers that migrating to another framework or stack becomes prohibitively expensive. This creates vendor lock-in and limits architectural flexibility.

Rising meta-frameworks like Astro and Next.js present mixed reviews and pain points around design decisions, configuration, and developer experience. No single framework dominates as a clear best practice.

Developers familiar with Rails and server-side frameworks experience significant productivity loss when adopting JavaScript SPA frameworks. The paradigm shift requires learning new tools, patterns, and mental models, resulting in slower initial development velocity compared to traditional server-side approaches.