One thing I wish redis had is the ability to extend itself beyond its memory capacity. So if I run out of memory, just move some stuff to disk. Or if I'm using persisted redis, just free up some memory.
If you're looking for a Redis-compatible key-value store, kvrocks[1][2] is an excellent choice. We've used it in many projects, and it's proven to be very stable. Since it's based on RocksDB, it doesn't have the memory limitations of Redis and the license delirium ;-)
Readit News
Maybe this is it.
[1] https://kvrocks.apache.org/ [2] https://github.com/apache/kvrocks