Razavi motivated the design of the Gain-Boosting configuration by stating that,
The limited gain of the one-stage op-amps studied in Sec. 9.2 and the difficulties in using two-stage op-amps at high speeds have prompted extensive work on new topologies.
I have tried to Google the reason why it is difficult to use two-stage op-amps at high speeds, but haven't found any explanation. For engineers with experience in designing high-speed amplifiers, could anyone provide an explanation or a reference related to this question?