People, including experts can rabbit on all they like.
folks the proof is in the eating, 1000s of untinned wire boats are sailing around for many many years. Ive have 7 boats, mostly very old, all had untinned wire, none suffered any significant corrosion
, in fact all were damm good in fact.
The worst was win I had a Fourwinns, most of that stated to rust away in France
. ( particularly the crappy aluminum calorifier
, replaced that with a good German brand)
The fact is, if this was a general problem, given the 1000s of such boats out there , they'd be a hue and cry, there isn't one, in fact on European forums
, this never comes up.