I don't think nickel is safe when heated above 700 (maybe 800?) degrees.
That is the problem with vaping on ni200 without a TC mod.
Who knows what heat you may be reaching.
Also just 1 burnt hit would not only be WAY worse health wise then kanthat or nichrome it would also change the nickel and make it unsafe to even use at all from that point on.
This is pure nickel.
No one has ever vaped it long term at all.
Why tempt fate?
5150sick, AFAIK all the wires we use have possible issues when dry burned (or we have a burnt hit) because of oxides that could form on them and then slough off into our vape. Nichrome is made of nickel and chrome. Kanthal is made of iron, chrome and aluminum. Chrome can make hexavalent chromium (chromium VI) which could be bad to inhale. Ni can make Ni oxide (Ni II) which could be bad to inhale. Titanium can make Ti dioxide (TiO2) which is classified as possibly carcinogenic to inhale. SS has chrome in it. Ultimately what matters IMO is that we don't
inhale enough of these substances to give us health problems.
None of these materials changes fundamentally when heated red hot, they just form oxide coatings. So which oxides do we have to worry about and is there a chance that we will intake enough of any of them to cause us damage? AFAIK no studies have been done yet that clarify this for us.
No one has vaped long enough to know what vaping in general will do to us yet either.
I also don't make contact coils for temperature protected mods (that takes care of Ni and Ti) and in my experience the chance of having a hot leg with a non-contact coil is
really small. Yes it can happen if a coil shifts (it hasn't happened to me yet though), but we can have a hot leg with a Kanthal coil too and who knows what we're vaping then.
This is all of course my opinion only from the research I've done for myself and I know it will not work for everyone. But when you say something like "just 1 burnt hit would not only be WAY worse health wise then kanthat or nichrome it would also change the nickel and make it unsafe to even use at all from that point on", I would appreciate more input from you so I could understand how you got to that conclusion and if I'm really missing the boat here.