timmmay:30X optical zoom is a waste of time. 10X is probably a waste. A range of something like 24 - 105 is fine in a compact camera, if you need things bigger just stand closer. The higher the zoom range the lower the image quality, generally, but it's probably not a huge thing. The best quality DSLR lenses don't zoom, they're fixed, next best is zoom with a range of up to 3, then everything else.
Yes everything is a compromise.
Standing closer isn't always an option, that's where bigger optical zoom comes in. Carrying around a range of fixed lenses to cater for a variety of situations isn't practical for the average person.
As a compromise for the average person optical zoom like there is on the TZ70 is not a bad option. Certainly much better than digital zoom.