I worked at a place where I saw two renewals for AdobeCQ licenses paid while I worked there at ~$600k/year, all the time we were using Alfresco underneath (and I see now that site is running on Sitecore...)
Ironically, it's Oracle itself who is busy self-destroying. The move to cloud-based subscription services, where switching to competitors can be so much easier, looks good in the immediate but it's pulverizing their stranglehold on partner ecosystems, and making their long-term outlook more fragile.
Yes, bean counters. When the only sales person involved is now the AWS Architect the bean counters put Postgres and Oracle side by side and it becomes a no brainer. You're going to see lots of enterprise development moving away from Oracle as they move to AWS.
I'd say it's more the "Contract Signers" who're at fault. The devs and AWS Architect are perfectly happy to use inexpensive AWS options, but somebody _else_ goes golfing and drinking with the Oracle sales team - and arrives at work hung over the next day with a shiny new half million dollar a year Oracle licence which everyone else is now required to use.
The bad part of running Oracle is absolutely everything else, especially the bit where you ever have to talk to Oracle. When we moved our stuff from Oracle to Postgres, the best bit was never ever having to think about licensing.