Calm yourself TV, don't feel too bad, the rest of the western world has other things to do now and again.
Meters, analogue v digital.
For may years I preferred an analogue meter (moving coil) for testing transistors and diodes, even if I was using a digital meter for general purpose fault finding.
Eventually I got to the stage in my day job where a digital meter was the only thing available, and finally I had a post where I no longer needed to test components from one month to the next.
In my home workshop my ageing analogue meter was becoming very unreliable, if I remember correctly it was the range switch that was the problem. I knew that it was time for it to go into the bin. I also knew that if I just put it into the bin, the next day Captain Paranoia would whisper in my ear "it is not that bad, take it back out of the bin", so I hit it with something big and heavy to render it beyond use.
Since that day I have not had an analogue meter on hand in my electronics work area.
I still have two analogue meters but they are in the garage, my "mechanical workshop".
TV tells us about transistors which tested OK but would not work in their intended application, in his case TV frame drive.
I have come across this problem about twice in roughly 50 years, but in my case it was always small signal transistors.
Tracing a signal through a circuit, it would dissapear after a certain stage.
Take the transistor out and test it, and it was ok on the "two diode" test with the meter, but it had no gain. An apparently working transistor but with no gain. Weird stuff.
Oscilloscopes, analogue v digital.
My main "go to" scope for general purpose work is a modern digital scope, made by Agilent, nice hand size to fit on the shelf above the workbench.
However, if I want to display the envelope of a high frequency waveform, such as a an amplitude modulated RF signal, the 30+ year old analogue scope beats it easily.
Maybe I have not got the right technique, or maybe Mrs Nyquists' little boy has a lot to answer for!
JimB