For us, we live in a rural area, and have always chosen to add a bulbar to our 4wd's. With saying that, the only roo we've ever hit was years ago when one jumped into us, while we were stopped! We seem to have more in our street than what we ever see while travelling. Not sure about them being a 'necessity' but we always feel a bit 'naked' until the bar goes on. The only thing attached to ours at the moment is the aerial - no spotties, no winch.
My teenage son has a tuff bar on his cruiser ute, necessary or not, I don't know, but for him, I think it just goes with 'the look' he wants. Yes, it also has aerials, spotties, winch attached! He likes it, and that's what counts for him!
Same son also made a miniature matching tuff bar for his 4 wheeler, also has spotties, winch and aerial attached!
Dee.