Thank you for a great summary of cases where usability is not a key factor! It is indeed quite common in enterprise products since, as you mentioned, UX is not what drives sales in that space. Moreover, in most cases, the people who decide to purchase a product are not the ones who will be using it.

At the same time, this could open new opportunities for a product designer to explore service design or customer experience—areas with less focus on UI and more emphasis on processes.

Great article, thank you!