In this talk at HasuraCon'20, Avinash Moondra discussed shifting from Rails to Hasura and the differences and similarities between the two. He highlighted four major shifts in moving from a monolithic MVC architecture to an event-driven service-oriented architecture: 1) Monolithic MVC vs Event-Driven SOA, 2) REST vs GraphQL, 3) ORM vs ?, and 4) Pillars. He emphasized that understanding these shifts can help developers transition smoothly from Rails to Hasura while minimizing surprises and increasing confidence in the new technology.