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.
used to think more-or-less the same thing: antiviruses are unneeded resource hogs...
until I connected my laptop to the network at school.
I didn't notice anything strange until a month later when I reinstalled WinXP (was doing it regularly for speed).
My mistake was that I installed Winamp and other software from kits on a shared folder (full access for everybody) on my laptop, before installing the AV.
That's when all hell broke loose: the kits were injected by some virus and got activated only when were run
tl;dr: Thing is even "power-users" can get it wrong. Is it really worth it risk so much, for so little?
PS: referring here strictly to platforms that need AVs
I really miss the "mark as unread" contextual button, but even without it FeedDemon is by far the best RSS reader I have. (The premium version is worth the money).
Also, lately I see a lot of great lessons from "lone wolfs" like Nick (FeedDemon), Marco (Instapaper) and Mark (Pinboard).
By far, the best actionable resource I used. Google search for answers/explanations & theory