TBH, that's the most obvious solution for eg. task management. I am sure majority of applications started at least 10 years ago started off their task managemen

TBH, that's the most obvious solution for eg. task management. I am sure majority of applications started at least 10 years ago started off their task management using the app database for queue management, before the proliferation of messaging queues. The couple webapps I worked on moved to a rabbitmq-based solution relatively painlessly (though old BaseTasks tend to linger for a long while still).