Low speed torque and driveability ?

We generally speak like Low speed torque and driveability is synonyms with each other, I have myself but the more I think of it there seems to be a flaw with this line of thought. A lot of times when we see an upgrade that loses low speed torque the consensus seems driveability will suffer, but were comparing a full throttle dyno run to part throttle driving, which an normal driven engine is obviously only making a fraction of it's full throttle capability anyways.

So at part throttle normal driving the engine needs only to make the power required to do normal driving which is generally a lot less than it's full throttle capability, even a /6 doesn't need to be driven at full throttle to get around town so even a /6 has a lot of excess torque available. And at full throttle were gonna spend very little time at lower rpms which leads me to believe that a lot of low speed torque isn't overly needed.

Which makes me wonder what we mean by driveability and what factors are we really talking about?

I would guess it's how the car handles normal driving and goes from normal to more aggressive to full throttle driving and obviously people's personal compromises come into play.

I have some ideas, but like to see what others think, what are the main factors that causes poor driveability ? And I guess what are we meaning by driveability ? Pretty sure it varies a lot person to person.