I wouldn't be without my Dremel tools - have the rechargeable and the Digital (series 4000?) mains unit plus the aforementioned drill stand, router attachment and a host of other bits.
They replaced my minicraft units as they wore out and give sterling service.
Tried a couple of cheap copies but they gave up the ghost fairly rapidly unfortunately.
As well as railway modelling I have used them for cars, household jobs, making theatre props and a host of other tasks - the lithium cordless unit has seen a lot of service at shows for on-site layout repairs.
Can't honestly see why you wouldn't want one.