Most modern software is horrible. Linux is objectively better than Windows and cheaper but it has much smaller market share. Same story with OracleDB vs PostgresDB. Developers recently identified a critical vulnerability in MongoDB that had been there for 10 years, yet RethinkDB, a superior product was shut down (at least the company) because they couldn't find enough customers. There are so many such cases.

They're vaporware in relation to what else is available.