My story is a little bit different, but maybe not so much?
I only smoked on average about 6 cigarettes per day, but I did that for 27 years...
--I had smoker's cough, but only when I started laughing really hard
--I had wheezing in my chest at night when I was lying in bed
--I hacked up one or two balls of brown phlegm every morning
I don't think my cilia ever were damaged enough to stop working well.
And I actually think that is why I hacked up crap every morning, and wheezed at night.
So when I switched to vaping, I stopped coughing, wheezing, and hacking up crap almost immediately.
But after a few weeks, there were some things that started to change...
--I started sneezing and pulling up clear phlegm every morning
--I still have some very slight wheezing, but only enough to shake something loose now and then
Both of the above issues increase when the percentage of VG in my juice increases.
My opinion on all of this is that my cilia are still in great shape, and each morning I'm pulling up PG/VG that is in my lungs.
And it is also my opinion that for whatever reason more VG makes it more noticeable, probably because it is thicker.
But once my morning lung-clearing is done, I don't have any more issues throughout the day.
And I think that is because the lung cleaning process works MUCH better when you are lying down.
This is confirmed to me by the fact that I can have the same issues when I wake up from any long late-afternoon naps.
So I do believe that PG/VG is coating my lungs from vaping, and I also believe I am clearing it out very well.
And having that PG/VG in my lungs does not concern me.
In fact, I think it provides a very big health benefit, and it really helps keep me from getting sick.
This is all my opinion, based on my experiences, and may very well not apply to anyone else.