If they had built this so they handled the SaaS part, but could persist the data in your organization's own AWS / GCP / Azure blob storage, would that be enough to get the solution past the line for acceptance? I'm in security, but in tech, where SaaS solutions are usually much more accepted.

The challenge with on-prem software of course is just how much support it takes to maintain. At my last gig, we deployed new microservices every 5 minutes; I can't imagine how much it would have sucked to worry about maintaining on-prem installs.

I'm wondering if this kind of shared model could make it workable.