(4) Important pattern #4: The bottom did not come in until the demoralization was so comprehensive that the tech crash wasn't even generating news headlines anymore, it was just sad and depressing. Also, until the hotshot public stock managers of the era were fired or retired.
(5) Important pattern #5: During the recovery, every single actual good thing that happened was painted as "TECH BUBBLE 2.0" by a histrionic press and commentator class. This continued for a full decade.