Splunk licenses (and likely a ton of other enterprise-y software) are actual files, so when we renew our license, it goes into 1P as an attachment on our Splunk item

I recognize that's not what you would use attachments for, but I'm offering that there are enterprises that get benefit from attachments, not just individual users

We have Software Asset management tools that manage those assests, This also tracks renewal dates, and various other aspects of Software management that makes password managers not a good fit.

Our password manager is just a password manager, I suspect many other organizations are the same.