I have a wide selection of tools and I do put them to use, albeit some of the more specialised tools are used very infrequently.
A multi-tool (the pliers and the knife being the most useful) can be handy as a fishing accessory or for camping off the beaten track when carrying minimal gear is a requirement.
I bought a multi-tool once and have been given a few as gifts, never really found any use for them save for perhaps fishing and to a lesser extent camping.
I can't think of any reason I would reach for a multi tool over a dedicated tool.
We already have knives and a can opener in the caravan, my wife will have a nail file or emery board in her bag of tricks. Add to what is already there a set of
insulated screwdrivers, standard pliers, taper nose pliers and you have something functional that will see you through a host of smaller type repairs.
Most of us will already pack a hammer and insulating tape and perhaps duct tape, how much remedial work are we really going to undertake when away in the caravan?
A multi-meter is a good addition to the toolbox.
Decent set of screwdrivers, 2 pairs of pliers and a multi-meter need cost no more than £25.00.
Sorry, but multi-tools are pretty much eye-candy and of little real practical use. If mine were taken away today I would never replace them (or miss them

).