Interesting concept. I had never looked that up (AeT). Although I do put in some 4-6 hour rides from time to time, I suspect that my AeT isn't all that high (relative to my FTP), since I don't do much of that riding (or much riding at all) in z3 or low SST. I spend a lot of time at z2 and focused intervals in z4 and Vo2 zone (z5+), but little to anything in between.
It will be interesting to see how the (imminent) arrival of our daughter may change that. I will probably do less z2 and overall hours and make up some of that with more time in the sweet spot, which seems to be common in "time crunched" plans. This may increase my AeT/LT ratio, even if LT goes down a little bit. I'll still do a VO2 block before big races since they are time efficient and seem to work well on me.
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"Your beauty is an aeroplane;
so high, my heart cannot bear the strain." -A.C. Jobim, Triste