Most of my work was mixed signal from DC to daylight... really low frequency analog FSK type encoding and decoding... Sensors of all types from hand carried soil measurement devices to large Center Pivot control systems single and multiple radio controlled remote valve control from 1" to 36" valves from 27 to 800 MHz RF control...
An analog scope is great for analog signals and a digital scope is BEST for digital stuff. trying to extrapolate an analog signal from the digital "Artifacting" that occurs when a signal is rapidly chopped can be a real issue... is that "noise" an artifact or a harmonic from a frequency multiplier (RF Transmitter Vcc).
I use and used an analog scope for many years for RF development, Audio or low frequency data voice and basic control stuff.
When looking at a square wave signal on a digital scope is that spike on the leading edge of the waveform an artifact or a Power Supply issue???
The chioce is really simple, good digital scopes (Rigol) can be had for less than $500.00 fully loaded. A Good Used analog Tek scope (2235) can be had "Certified, Calibrated and guaranteed for about $150-$200 MAX used and the 2235 is a 100 MHz dual channel scope... I saw 4 or 5 on a quick Ebay scan @ approx $125.00 (AVG) price. The 100 Mhz bandwidth is the 3DB point...
They're as a class good to 150 MHz or more... easily meeting the Rigol analog measurement spec's. Both types of scopes are valuable for the things they do best...
However there is no scope (affordable by most of us) that will do both well... I see Digital "USB" "Scopes"??? with 10 - 20KHz effective vertical bandwidth's for $150 + dollars... Junk for anything but an Arduino and not very good even for that purpose.
A scope is a serious investment. If all you want to do is digital work then BUY Digital... But buy the very BEST you can afford. If your scope and your EXPERIENCE in properly using it is good you have a fine instrument...
But IF you have little experience in digital scopes you can spend a lot of time fixing both Digital AND Analog things that ain't broke....
Perhaps the easiest comparison would be a fine target competition Rifle... is NO BETTER than the man pointing it...... IMNSHO
Doc