What damage can occur driving with all cylinders misfiring?

I had a costumer ask me a funny question today at work and it actually stumped me… His 4 cylinder Honda accord was misfiring on all cylinders it was obvious the distributor was bad he was hard headed and wouldn't listen to me about anything anyways he asks me will can i drive it? I said… Well you could but it wouldn't be good for the engine, he then asks me well what could happen? Lol i basically got stumped… I didn't know how to explain to this man what exactly kind of damage can occur if your driving with all 4 cylinders of the engine misfiring the entire time… So what would you say could be damaged? Besides the entirety of the engine… With all the ignition parts and timing pieces, sensors and electronics?

I had a costumer ask me a funny question today at work and it actually stumped me… His 4 cylinder Honda accord was misfiring on all cylinders it was obvious the distributor was bad he was hard headed and wouldn't listen to me about anything anyways he asks me will can i drive it? I said… Well you could but it wouldn't be good for the engine, he then asks me well what could happen? Lol i basically got stumped… I didn't know how to explain to this man what exactly kind of damage can occur if your driving with all 4 cylinders of the engine misfiring the entire time… So what would you say could be damaged? Besides the entirety of the engine… With all the ignition parts and timing pieces, sensors and electronics? 4 intermittant misfires, but it drives in to the garage for him to ask that question?
That has to mean that within, say, the last 250 key warm-ups, all 4 cylinders have misfired. The car is ok right now if you can't tell by listening, there's a definite misfire.
When the misfires increase to where the engine has an obvious difficulty idling, the fuel that is unburned will start to accumulate.
The plugs would begin to foul till it stopped running all together.
The presence of the unburned fuel would try to wash down the cylinders, accumulate in the oil, and the catalyst would suffer, even begin to plug and melt internally depending the amount it received all at once and how hot it was, and whether it was idling or running down the road.
So, you hope it is like it runs so badly he tries to tune it up and changes plugs. Notices the carbon, and starts trying to test his codes for the light he put the electrical tape over.
If washing down the cylinders was effective for the damage, there would be a loss of compression across the set.
If he failed to change his oil, he would be losing the lubricity of his oil, the viscosity of his oil, and damaging everything the oil lubricates.
He could even try starting too much and start a fire that burned it down.
Right now would be a bad time to use cheap methods and aftermarket parts if he wanted to keep the car. Don't feed the scammers. This is a reposted question from 2015. All cylinders misfiring = an engine that doesn't run. Start over by starting the car.

Don't feed the scammers. This is a reposted question from 2015.

All cylinders misfiring = an engine that doesn't run. Start over by starting the car.