You’re in Peak phase already while most of us are just starting Base. 
Do you live Down Under or do you ride in any type of weather in order to put in 20 hrs/week?
I would guess the vast majority of us will hit our max hours per week well shy of 20 hours.
Extreme-2 is well, extreme. Useful for a block of intense training for some, but not many can hang there for very long. YMMV
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