[redwood]

People scale postgres by horizontally sharding it at the app-tier, and end up reducing its query capabilities to a glorified K/V store... They do this routinely and think it's normal. Then they use other things like Cassandra or Cosmos DB to augment the scale gaps that this leaves out (see what OpenAI is doing). Then they typically run a search engine and a cache as well. People think all of this complexity is normal/unavoidable because their cloud providers will happily see them consume all these different services.

[agos]

The implication is that scaling pg vertically should also obviate the need for a cache or search engine?