(Former) Salesforce employee here, long enough to have been there a couple of years before the Heroku acquisition. I can't let this stand without a comment.
Heroku never seemed to want to integrate, but instead be the "cool kids", those who just do not have to worry about the enterprisy stuff such as automated backups, DR, high availability, enabling Java, etc. Everything they did was great, everything "Salesforce" sucked, yet they never made any money before the acquisition. The acquisition was a waste of money in first place (IMHO).
Heroku never seemed to want to integrate, but instead be the "cool kids", those who just do not have to worry about the enterprisy stuff such as automated backups, DR, high availability, enabling Java, etc. Everything they did was great, everything "Salesforce" sucked, yet they never made any money before the acquisition. The acquisition was a waste of money in first place (IMHO).
The founders did not even try and so they left.