For me it was one of those tools that I needed for a specific job. I can't remember what is was but it kept my wife quiet at the time.
It became one of those tools that I wish I had bought earlier.
The cutter I use the most is the little cutting disc, great for slicing out bits of broken nail, de-headed screws, aluminium strips etc, etc.
But I also do a bit of model making and this is where it scores. I now have a battery powered Dremel for the model making, it's just a bit
easier with the tricky modelling stuff without the trailing power cable. That one is in my workshop.
I guess though, it depends what you are going to use it for. Undoubtably it will be used for stuff you never thought of!