Actually a lot of Moscow tech workers came back after fleeing initialy to Yerevan, Tbilisi, Baku and Istanbul.
Most bought Bloomberg propaganda and were expecting a crash. It never came. On the other hand Moscow feels great, restaurants are packed and most of people I know are back to their consumerist habits (sans some Western clothing brands).
Russian consumer exhaled and watches Ukrainian war like a soap opera on Telegram that they discuss with coworkers or on Patriarchy Ponds.
Nobody will learn a lesson.