Can I ask why it would have stopped being considered a viable data storage option for new projects? Are you asking about document storage as a whole, or MongoD

Can I ask why it would have stopped being considered a viable data storage option for new projects? Are you asking about document storage as a whole, or MongoDB specifically? I've been using MongoDB for many years on most new projects. The advantages I find are that it is easy to setup and use and lends itself nicely to adapting product requirements that typically accompany a new project. It's also nice that there is a large community and talent pool that supports and is familiar with MongoDB, so if you bring someone on to your project, you don't have to worry about someone getting up to speed on a less well-known document store. In any case, I would consider it a viable option for any generic "new project" though the devil is in the details and there are certainly project requirements which could make it less viable.