To all the moderators, feel free to remove my text if you guys think it doesn't belong on this forum.
To understand if smoking is unhealthy in Cyberpunk, we first need to know what smoking exactly does. So, let's say the cigarettes are the exactly the same as in our lifes, will smoking be healthy with for example Cyberkentics lungs.
It depends, let me explain why.
Everyone thinks Nicotine is a dangerous substance, which it is but not the most dangerous substance in a cigarette.
First of all, the avarage heat of a Cigarette is 650° c with a single puff, it can be higher or lower, but average is 650° c. That hot air will be inhaled, which goes in your mouth, throat and eventually to your lungs. In my education, they thought me 2 parts of a human body where you can't have absolutely no burning damage. That's your groin, and your lungs. So, people have a heat source that can go up to 900° c close to their mouth, while lungs is the most vulnerable part for burn damage.
Let's go to the next subject, the most dangerous part of smoking.
The air in Cyberpunk that people breath in, will be probarly even more worse as our own air. The air that we breath in and in Cyberpunk contains different substances, one of those substances is Polonium. Polonium is a radioactive substance, but it's only in low dosis in the air, which doesn't harm a human body. But a tobacco plant pulls those substances towards itself and holds it, which creates higher amount of dosis. Smoking contains Polonium-210 and Lead-210 in higher dosis. And what it does is slowly changing your DNA, which can create different diseases.
So, this leads to the question "is smoking bad in Cyberpunk". First off all, you need to have eletronics and Cyberkentics that is resistance to a X amount of heat. Then you need to have Cyberkentics that filters out Polonium 210 and Lead 210, but even if it does, its still in your body. How can you get rid of those substances in your body? So, you also need to have lungs with a exhaust pipe to remove all the unnecessary smokes and substances.
But nicotine still needs to get to their brains, otherwise the whole "feeling" of a cigarette will be gone, so it would be pointless to smoke then. So, to answer your question. I think personally that smoking is still bad in Cyberpunk 2077, even though they have Cyberkenitcs and artificial lungs.
But yet, I want to argue a little bit against it.
From a other point of view, in the world of Cyberpunk 2077, people have eletronics inside their bodies, the whole city is covered with lights, the amount of electronics is way higher as what we have. It could be that humans in Cyberpunk 2077 have a higher resistance to radioactive materials.