I have an old 4 trace Textronix from the 80s. It has been useful in troubleshooting I think twice since I have owned it (about 15 years), both times in looking at more than one signal's progression/timing. A logic probe was useless for this - I had to see the switch matrix pulses and found out that 2 were occurring at the same time instead of one after the other.
I am actually shopping around for a newer scope because I would like the storage capacity and better trigger/capture/usb functionality. I also have an 8 channel logic analyzer which while it would perform the functionality of storage etc. that I'm looking for I'd have to drag my laptop around to use it.
I get way more usage out of the multimeter and logic probe than a scope, but when you need a scope, you really need it.