Jenkins, Google Borg, Cloud Foundry, Concourse Pipelines...and surprise surprise when you look at where he came from...Ex-Google, Ex-VMW, RabbitMQ...
If OP wasn't in and around the source of all these tools above then they were at the very least first cousins to the story.
The sales cycle is long, integrations require multiple dimensions of executive buy-in, especially security and networking.
I think they made something nice but it felt like a nothing-burger story about something that is constantliy oscillating between bespoke and commoditized due to upstream problems that are such a mix of issues. Lack of oversight to micromanagement, inexperience to too much experience that they cannot let go of "the way it's always done".
It may be just my unpopular opinion but you are boiling an ocean of problems selling toolchains. Business and Tech are like water often finding the holes that lead to a path of least resistance, even when these erode the foundation of "core business". Toolchains that behave like guidelines and "parenting strategies" with removable guardrails have always offered the greatest rewards in my experience.