I recently had occasion to file a claim on a trip that I was prevented from taking due to an injury. I NEVER buy trip insurance, but the group I was joining recommended it. I felt they would be the cause of me having to file a claim and instead it was my misfortune to have to cancel.
When I was researching which travel insurance to purchase there were so many companies making so many claims it was hard to sort through them all and took a lot of time.
If you had a message board on trip cancellation/interruption insurance, perhaps those with some experience buying and using this would post their wisdom, as they do on some many other boards in this forum.
I know not many business travellers purchase this, but on a personally paid trip to Timbuktu, I'll bet they might.