Stateful services meaning the default way every web framework has structured a web application since 2005?
Most websites don’t need it, and it makes things harder to manage when rolling out new versions of your services. Life got significantly easier once I moved away from stateful services.
Even at a new company I don’t think I’d ever want to go back to stateful sessions. I’m not close to Google or Amazon scale, and managing state was significantly harder than dealing with JWTs.