I don't know what you are smoking here but let's take MongoDB vs DocumentDB or Elastic Cloud. Mongo built a 30B$ business around Atlas that is growing at a staggering rate. DocumentDB has a tiny share. Same with Elastic.
Also what the hell are you talking about with RedShift. Decoupled Compute and Storage is a far superior architecture. Here is an expert from snowflake.com - " "Snowflake was founded on the belief that tying compute and storage together is not an effective approach for limitless, seamless scaling."