1/8 Nitro cars and trucks are not any more expensive than electric. actually, they're cheaper in the long run due to less support equipment and stuff to damage.
This statement makes assumptions about the equipment that a person has or doesn't have. If you're talking about someone whos buying their first RC then yes theres less support equipment to buy but if someone already has an electric then they already own all of the support equipment. At that point then a nitro is more expensive because you have the continuing cost of fuel. In this particular case were talking about someone who already has the extra support equipment.
As for there being less stuff to damage on a nitro, I really dont understand that line of reasoning. the only marked difference in parts in an engine vs an ESC/motor so I guess your technically right in that the power plant in an electric is technically 2 pieces instead of one. That being said I guess I could argue that an engine is techncially also 2 parts, the engine and the carb. Other than that all the parts are either the same or you're substituting one part for another part. For example you could say that an electric rig has a battery but technically the nitro has a battery also plus a fuel tank so its not really less parts.
Also, before you go talking about how ESCs are easier to damage then nitro engines I would rebut that an electric with properly selected, good quality electronics and proper gearing will last for many many years just as a nitro engine will. By the same token if someone doesn't properly maintain and tune a nitro engine it could have a very short lived life also.
Generally speaking Id say its mostly a wash.
The engines last longer than brushless.
I dont agree with this statement either. Brushless motors will last for many many years if properly used and maintained just like a nitro engine. Even in the event that a component goes bad like a bearing for example it can be replaced. Same is true of nitro engines. If you have a con rod, bearing, piston, or sleeve go bad or wear out they can be replaced.
No speed controls to fry/pop.
A good quality ESC that is sufficient for the rig, motor, and gearing set up you're using for is not likely to fry unless you have a manufacturers defect but you can have a manufacturers defect in a nitro engine as well. Again its a bit of a wash.
Trannys/gears are usually stronger.
This is absolutely flase. Brushless motors produce waaaaay more torque than a nitro engine and therefor have to have stronger gearing than their nitro counterparts. Thats why when people do a brushless conversion the very first thing they damage are the gears and usually they get damaged very quickly. Thats why you will find plastic gears in nitros way more often than you find them in electrics.
Suspensions (Swing arms/hubs/bearings/shocks are usually stronger).
Again, i dont understand this conclusion. I'm going to assume by swing arm you mean a-arms but the a-arms, hubs, bearings, and shocks are no different between nitros and electric.