Note that it is the dominant subscriber database in the telecom space. There is a high likelihood you are using it as part of a home location registry or similar when you use your phone.
Here's a benchmark comparison with Redis (outperforms it on a single node):
Here's a YCSB benchmark where it beats all other well known key-value stores (not reproducible, but all database vendors (except RonDB) have a DeWitt Clause):