Currently, there are Service Previews and Preview Environments, which are extremely confusing. I accidentally ran migrations against my production database, because I enabled Service Previews, expecting them to work like in Heroku - it's own standalone services generated. I think most people will be confused with this approach, not to mention this requires use of a blueprint-linked service, and this is not something everyone uses. So I'd like to see Service Previews improvement - make the default to replicate the service, but provision new instances, so that it lives in its own sandbox environment. Considering I don't want to link a blueprint, as it's quite scary to mess with a production setup, I will have to completely stop using previews until then. I have a feeling I am not the only one in this boat.