It is slightly questionable whether this episode is really the cause for the switch. Around the same time frame significantly faster switching transistors becam

It is slightly questionable whether this episode is really the cause for the switch. Around the same time frame significantly faster switching transistors became available which allowed DC-DC converters to reach higher efficiency by increasing switching frequency, which has the nice side effect of requiring smaller filtering capacitors at the expense of requiring lower ESL/ESR. Also over past 5 years or so small chip low-voltage MLCCs became available in previously unheard of capacities that are perfectly usable for many bulk filtering applications with prices that are competitive with aluminium electrolytics.