"Cruisable" with hot cam?

[J.Jensen]

Note: I don´t have a V8 car - and the only ones I´ve driven have been big heavy auto cars, so bear with me if its a dumb question.

Whats the problem with a "hot" cammed for high revs engine that makes it unsuitable for street and cruising use?

Is it stalling if the throttle is opened too fast or low torque in the bottom compared to a bottom-stronger engine that makes it harder to start/stop?

"over here" (Europe) we´re sort of stuck with tiny I4s - so I´m struggling a bit with the concept of a 5 litre not being capable to cruise along at idle in gear when a 1.2L 4 cylinder can in even 1:1 gears.

I´ve driven a few cars, porsches and the likes with on/off racing type clutches - and they all behaved as long as they were rolling, albeit a bit difficult to start on low rpms and uphills...