The sample period necessary for quantification hasn't been large enough to study some mid-range and longer term effects.
There have been quite some athletes released due to natural attrition, i.e. injury, financial reasons perhaps and other family related matters.
If one rules out loss of motivation an athlete can remain under the influence of the Tutberidze effect as long as the competition results warrant it.
So far, the gender distribution in the various age ranges give little conclusion about the actual longevity of an athlete under the Tutberidze Effect.
In relation to the ongoing discussion about the 'self' plus intellectual and emotional maturity of children, adolescents and young adults one needs honest and objective answers why some top names left at the upper end of the age range, while others stayed.
AFAIK in the young adults, we only have Moris Kvitashvili, who can be considered a sort of pet project, AKA lab rat #1 ;-)
in the almost grown up adolescents we have Elisabet Tursynbayeva, sponsored in a conscious choice by her parents to remain under the influence of the Tutberidze Effect with good results and to be considered at the peak of her career;
and we have Alina Zagitova, who is the best example so far of a sportsperson tremendously improved under the Tutberidze Effect, had excellent results and is currently at the peak of her powers.
Why did these athletes stay and other athletes leave while still or not even in their prime yet?
When one rules out reasons listed under natural attrition, could it be they rejected the Tutberidze Effect by some part of their psyche? These can be completely valid personal reasons like motivation, wish to have a new outlook, etc.?
Would consciously choosing to stay under the influence of the Tutberidze effect have objectively benefited their actual competition results?
All of this comes probably down to psychology, both on part of the trainers and on part of the athletes, as mentioned by some other posters.
And since humans are always learning, even without knowing, it would be interesting to study this aspect of the Tutberidze Effect by observation, to gather indirect evidence, since direct vocal or written evidence is often distorted by emotion.
It will keep us occupied and feed our discussions
