I agree 100%.
I think one of the problems is this. Nowadays It is easier to get information on 400 programs. C Harts stuff is on the web. Your stuff is on the web. Guthries training is on the web. as well as snippets from several other past and present 400 runners and coaches. So now we have all this info. Most of it pretty sensible stuff. Yet none of these programs was specifacally tailored for the athlete we are coaching. So now we must sift through everything and try and construct a program that is optimal for our athlete. We must consider age,training age facilities or lack thereof. Injury history,weather ( a big issue in the north east)
and most importantly what does the athlete respond best to.
This can differ from athlete to athlete… I have found this to be a major issue. The more people you coach the more differing factors in the individual come into play.
This does not even begin to adress which program is best. LtoS ,Sto L ,concurrent.or something different.