Metabase can be self-hosted, but you cannot self-host Salesforce or Mixpanel or many of the other products I'm referring to. In an ideal world, every company would self-host their own instances of all of their products, since that ultimately forces them to be solely responsible for their customers' data. Using the cloud versions of these products shifts the blame from the company itself to the vendor when things go sideways, so it makes more sense for them to do this instead of taking responsibility.