The trade off is drive-ability and throttle feel. The vehicle will feel sluggish, but it won't "roll coal" if you ease into the throttle. This can be proven by gasp actually driving a diesel powered vehicle and a) stomping on the gas pedal and b) easing into the gas pedal.

The more common solution it diesel particulate filters in-line of the exhaust pipe that cause the soot to completely burn off. This is a trade-off because the DPF requires maintenance. Some systems even go so far as to implement aggressive exhaust gas recycling, pumping already burned exhaust back into the intake to be burned again.

And for references... 1. Why do diesels produce black smoke..... https://commercial.lubrizoladditives360.com/black-smoke-caus...

2. What is diesel exhaust..... https://en.wikipedia.org/wiki/Diesel_exhaust

3. Diesel misconceptions..... https://phys.org/news/2011-06-myths-diesel.html