I'm renewing my PPL again so I can indulge in the more adventurous type of aviating than remaining 1g and erect most of the time. EFATO's have been thrown at me. Surely the adage of 'no turn back' depends on many parameters; e..g height, speed, type of a/c, wind velocity, experience of PF etc. etc. It's not a 'one size fits all' rule. It is a rule of thumb.