No problem, it simply helps me get the sound I'm after. Also I don't think that the internal delta comp and an external compressor really fulfill the same purpose or impact the signal the same way. The diamond really tightens things up and adds a bit of something extra that's hard to explain.
Totally true, if not, all compressor pedals would be limited (pun intended) to just one knob or just an on/off switch.
What is going on inside the amp is peak limiting in the case of the always on deltacomp, and a one size fits all on vintage mode, which is only affected by the amount of gain knob you throw at it. In the case of overdrive, there is really no compressor circuit, just the inherent compression in ALL overdrive/distortion circuits, which is a whole other topic, but basically anytime you run a signal into clipping (which is how all distortion/fuzz/overdrive works), the dynamics are automatically compressed hence notes sustain longer.
An actual compressor pedal allows one to vary the dynamics and tone in ways a built in amp circuit can't. But personally, I rarely use them as a bass player, the built in peak limiting has been sufficient.
As an audio engineer, it's almost like Frank's red hot, "I put that s#!+ on everything". But then the goal is simply dynamics control with as little audible " compression " and pumping and breathing as possible.