You need to reread your Lydiard .
Lydiard wrote that 2:12 was about as fast as they would go on a fair flat marathon course.
Was he correct?
Lydiard wrote that any supplementary mileage would be helpful, however slow
The best today run less or similar volume as the best from the 70s.
But the overall quality is much higher.
True's logbook reads more like Moorcroft 81 w an extra long run.
He's running far less volume than Shorter used to break 28, far less volume than
Solinsky used to break 27.
Lydiard believed hill bounding was useful.
Nobody bounds.
Lydiard believed ight shoes w/ minimal heel lift would be best and macadam surface best.
Modern running is maximal heel lift, stick to soft surfaces as much as possible