Using Redis as the main/primary datastore?
1. Redis eliminates the cognitive overhead of learning another database language or data structures. What you know in your programming language can be more or less replicated in Redis. For anyone who does not come from a database/SQL background this is huge. Also you don't have to learn a new system or paradigm.
2. Speed - Hands down, Redis is the fastest datastore out there, at least going by practical experience. Forget about benchmarks and all that.
3. Resilience - Redis got a lot of flak for the AOF bugs that are mostly sorted out now. You have Sentinel, replication and what not. At least DR is not a concern anymore.
4. Plethora of clients - this was never a concern but, the client support has vastly improved in the past couple of years. We even have Async clients now.
I am glossing over the details, and am happy to jump in if required. Given all this, is anyone using or even considering Redis as their primary datastore or is Redis still seen as a cache for most use cases?
It'll be cool if we can have a constructive debate around this topic.