Haven't you heard? Sales force doesn't hire programmers anymore. AI is all their CEO needs. ;p. Seriously though, this behavior reminds me of Oracle, and is a great reminder that proprietary software can very quickly become a big liability.
I used Solaris on Sun Fire machines and the support was unmatched, we got massive tome manuals that described in excruciating detail exactly how the system worked in almost all scenarios and a deep programming reference.
They never upselled us on anything, or changed the price.. until Oracle bought them and jacked the support costs up (though, to be perfectly fair, they ought to jack the support costs of old systems up).
They very much understood the "Developers! Developers! Developers!" mantra.
I'm sure Salesforce is terrified of growing their market cap by 3x