I agree. I studied at one of Europe's top "research universities". The most important courses often had the most famous profs, who also were either bad teachers or put no efford into their teaching.
On the other hand the course I learnt the most from was taught by a passionate lecturer who isn't even a professor, and he gets the highest ratings every year. (Yes we have a "rate my prof" event)
You get downvoted because you're implying substances like methamphetamine are common in vapes (as per your linked article), which it obviously is not, and already highly illegal.
The truth is you can mix your own vape juice from just PG, VG and nicotine. Which are completely harmless to eat (except nicotine) and used in food products.
A more rational discussion would be about if inhaling PG and VG is harmful to the lungs, or the additional unregulated stuff you find in flavoring of vape juice.
I used it on a SLURM cluster before. The documentation is done well and should be a good introduction. The only issue I had was that the cluster didn't have fakeroot or sudo, so I had to build the apptainer locally and transfer it to the server.
On the other hand the course I learnt the most from was taught by a passionate lecturer who isn't even a professor, and he gets the highest ratings every year. (Yes we have a "rate my prof" event)