Taking the bones out of this:-
1) We seem to agree that we take the last part of the corner (still the corner, not the straight itself, please note) while at (my term) a tangent to the corner line. We seem to disagree on how early we return to this 'dead ahead' position.
2) We agree that sticky tyres make a difference to our driving style. We don't agree that our driving style 'transforms' from the moderately sticky to the tolerably sticky of today's karts. If 'my lot' (in history) didn't need to change their driving style (except for going a F*** sight faster) when moving between tyres that were 2 seconds a lap difference, then I don't follow why we'd need to change for the minor difference in modern tyres. You seem to forget, in 'my day', it was all out WAR between tyre manufacturers. The use of one make/model of tyres for a class was still a pipe dream back then. 2 or 3 manufacturers would produce a range of tyres to be run at 'international meetings'. You'd need to be a factory team/'named' driver to get a set of the ludicrously sticky tyres: team managers were selling their bodies and souls to get a 'quick' set. Things are MUCH more civilised now..... and thus less sticky as there is no financial demand for that level of 'sticky'!
3) We seem to agree that 'release' only occurs when the 4th wheel has touched the ground. Whatever else happens, it's NOT the moment when the kart loses some grip. We don't agree that modern karts DO take the corners on three wheels (except, possibly, in the wet). I agree that the loading on the inner rear tyre is reduced but, in most cases, it's still in contact with the track, just with less ground-pressure than the outer wheel. One has to note that simple mid-corner-roll-tendency would deliver that WITHOUT the caster angle effect, anyway.
These sort of discussions are always fun, though!
Ian
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