Sentry has introduced a new Ruby SDK that enables performance monitoring for Ruby applications, providing visibility into frontend responses to database queries and distributed tracing capabilities that link backend issues to frontend performance. The SDK supports popular frameworks such as Rails and Rack Middleware, integrates with developer tools like Jira and GitHub, and offers customizable sample rates for sampling traces. With the Ruby SDK, developers can gain insights into their application's performance and identify areas for improvement, helping them modernize their approach to working with Ruby and meet the demands of today's users.