"Enterprise" is still very much in the camp of "using Oracle". Which is likely how they survive despite being so customer unfriendly. "Enterprise" users are simply using what "the enterprise" purchased and have little choice in the matter.
Every enterprise company I've worked for that used Oracle either completely migrated from it or is / was in the process of doing so, which is why I asked my question. I don't see startups lining up to do Oracle either, not in the way old businesses used to.
'Enterprises' use Oracle's ERP applications. Oracle's ERP covers many facets of industry such as HCM, Finance, Procurement, Property Management, Oil & Gas, etc.
What a coworker did when he was starting college back some decades, he asked where all the COBOL jobs were, the teacher got very angry, so he dropped out and went to a different university, where they were teaching Delphi / VB which definitely had a better job market. So you might never have a "perfect" number, but at least locally, you can kind of figure out what local employers are hiring for, which is usually what you'd care most about anyway. I think we've reached a point where unless you're doing something specialized, for the most part programming language choice is about developer familiarity these days.
"Enterprise" is still very much in the camp of "using Oracle". Which is likely how they survive despite being so customer unfriendly. "Enterprise" users are simply using what "the enterprise" purchased and have little choice in the matter.