We had a tektronix in our lab that actually broke. Somebody dropped it from a table, mind you it was a 500 MHz 4-channel scope. Not actually a field unit eh. But in its half fixed state it was still more reliable and easier to use than a Hameg. And they'll find my old thinkpad 760el with that tek scope. 15 years old, works like a charm, rare case where the copper traces are holding the pcb together (there's a crack down the motherboard). Also the battery still lasts half an hour.
But to get back to the point. Scopes are very versatile. A good 4 channel scope often doubles as logic analyser. Plus a scope can often be made to trigger on very exotic events if you're a bit handy. Not to mention eye diagrams to study clock jitter.
But I can't live without my spectrum analyser and network analyser either. A network analyser is potentially one of the most powerful tools in a designer's arsenal IF he knows how to use it. Coupling between lines, impedances, modulators, delays (tdr, which the high end units are very very good at), etc. Another must have is a good signal generator, even for digital design. Replacing your onboard clock with a reliable one is very useful, and for analog design it might be even more important than a scope.
Another great tool is a can of freeze spray!
