[Yyaqyped]

Hi Deshy, It seems possible and accurate to me to sum up one aspect of what the question and OP is about in the way you have above - whether later texts are credible. My comment was not in deference or in relation to yours, as I recall.
I am getting more and pragmatic as I get older and it is all about practice to me - ending suffering and thus I tend to focus on the putting into practice aspect.
In saying this I am not saying that others do not also focus on application or that one interpretation, one way and one culture is better than an other - I really do not see the need to believe all can not exist equally.