While I understand and generally agree with your points, I do find the idea of "holding a vendor accountable" to be more of a philosophy than something I've gen

While I understand and generally agree with your points, I do find the idea of "holding a vendor accountable" to be more of a philosophy than something I've generally witnessed happen in real life. At some point that needs to stop being weighed on the scales when doing "build vs buy" math for any but the largest companies or most attentive vendors.