A week later. "OK, their install team says it can't technically do C yet, however there's an early 2026 preview scheduled which addresses most of C. The D feature isn't in the edition we have, our buyers are talking to their sales people and we may need to pay extra to unlock D. And you're correct that two other organisations in our industry confirm X is dogshit and you'd be better off without it but it can't be disabled. Still A does work, and we have filed bugs about the known defects with B so hopefully we can get those fixed"

Every time I buy a product as an ordinary consumer I marvel at how much worse my huge employer is at buying products than I am. I reckon if they were sent to the store to buy a whole roast chicken with a £20 note they'd come back with six expired chicken sandwiches and no change.