sticky sessions versus stateless services, when should you pick one.

hey all, ive been thinking about session management lately. specifically, the trade-offs between using sticky sessions with load balancers versus aiming for purely stateless services. sticky sessions can simplify things initially, especially with legacy apps, but they create single points of failure and complicate scaling. stateless services are generally preferred for resilience and scalability, but managing user state can become more complex. what are your experiences. when have you found one approach clearly better than the other, and what were the deciding factors.