In that case, I think you answered incorrectly for the purposes of this poll. You only have one because it was included, but wouldn't have bought one if it was optional.
I think a sizeable percentage of the complainers on this subject are just reacting to the fact that something was previously free & will no longer be in future. Not that they actually need or ever use the UMC. There are very few "emergency" situations where a UMC would save the day. The only scenario I can think of would be driving to a destination that's not your own home and arriving with 0% battery, then being fortunate to be close enough to a house to be able to plug in to a 13 amp plug. If you run out of traction battery charge in a random street somewhere are you going to knock on doors until a kind stranger lets you plug in your car for enough hours to get sufficient charge to drive somewhere? Other scenarios are not "emergencies" but are planned use cases.
Planning for occasional use like charging overnight at a relative's or charging on a camp site are obviously different & I can see how some people may want to do that. Personally I find it more convenient to just go to a nearby rapid than to mess around with trailing cables. Definitely shouldn't be using an extension lead with a UMC either, that's asking for trouble (but an off-topic conversation).