I would argue that the most commonly used programming language is Excel. But few of the people using it realize they're programming. It's a brilliant reactive data programming model that makes intuitive sense to non-technical users. They feel empowered to use it to solve problems right now with a computer. They experiment with it, try things, Google how to do more things- just like any programmer does. And they feel…
When I consulted at a health insurance company (a Blue Cross Blue Shield licensee with 1000 employees, 200 IT staff) about 10 years ago, I was absolutely horrified that the system of record for health care plan data was Excel spreadsheets. They had staff who would update the claims processing system based on thousands of spreadsheets. When you called customer service, the CSR app would auto-open the member's plan inf…
I've seen this a lot where a consultant will swoop in and tell them that they need to use Peoplesoft or something and the organization spends millions of dollars and years of retraining to get a system that has a lot more friction in their actual workflow and is never quite as good for getting the job done.
Of course there are often side benefits that can't be overlooked, like a much more sane backup solution, interoperability with other providers, etc... But in the end most of the employees will tell you straight up that the old system was better. Too much of the domain knowledge was baked into the old system and doesn't make the transition to the new system.