I've seen lots of DBs like QuestDB, Materialize, Yugabyte but how do they compete/market in a cloud-dominated world?<p>My org has an RDS-or-bust model. Are there that many specific workloads out there?
Usually they either build their own cloud offerings (and distribute them via AWS/GCP/Azure/Alibaba/etc. marketplaces) and/or cater to the old-school audience that doesn't trust managed cloud services (with enterprise licenses, support, consulting, etc.).
Each database will differentiate itself and shine for specific workloads. A case in point is QuestDB, which deals very well with heavy ingestion (high cardinality / out-of-order data). This lends itself well to use cases around financial tick data and IoT data.