DSO's have a inherent problem associated with aperiodic transients due to the frame rate.
In fact these scopes often tout their less than magnificent frame rates, typical small benchtop,
in the 400 - 500 K
For these reasons a good analog scope still quite useful depending on your design work.
This article discusses the important parameters to remember in choosing the right digital storage oscilloscope for designing and testing circuitry.
I have a Tek 7104 in my collection that still gets turned on occasionally. Pure analog BW of 1 Ghz.
No funky memory limitations, true real time not pretend real time, no front end massaging in
signal path, its all good. In fact being a plugin scope I have most of the plugins made for the
series, making it a broad based test system of much capability. Like its TDR or its diff amp down to
10 uV/div (but not at 1 Ghz). Or its curve tracer.....
Also have a scope that needs > 1 KW to turn it on. Where else can one get a heater and scope
in same package for a cold lab. Shes a beauty......dual beam, what more could one ask for
Regards, Dana.