3-oscillator synthesizers, is OSC 3 the conventional tone generator and OSC 1 and 2 used for modulation?

[salsantana0]

I sheepishly ask a question about...... well, title says it all......

I THINK the trend I've noticed is that OSC 3 is MOSTLY used to create/set the tone of the patch, while OSC's 1 and 2 are relied upon for modulation........ however, the MiniMoog, as I recall, gave OSC 3 the modulation tools, while OSC 1 and 2 were the main tone generators. Of course, the LO (frequency) setting on 1 and 2 was a source of modulation...... I THINK.....(?).

Some most basic questions can be so difficult to verbalize, that's a bigger challenge than the answer What and how to Google a subject isn't necessarily as easy as I'd thought.......

So, if anyone has a sense of what I'm talking about, any thoughts, leads to further info will be most appreciated....... even if it's just WHY OSC 3 is what I (awkwardly) see as being the tonal source and OSC 1 and 2 left to modulation. Both OSC 1 and 2 are as capable as OSC 3 for tones, but I have the curse of "sequential" thinking and a bunch of OCD in constant pursuit. Left to right, numerical order, etc. .......... need a "wacko" emoji here.......🤪

Finally, as a newcomer I should mention I can fill up an entire server with what happens because brevity is definitely not my forte   Thanks in advance to the patient and kind, and certainly to all who support this excellent resource.

Best regards from Baltimore, USA