Why use an eSIM in Russia?
Russia is the destination where arriving unconnected causes the most trouble, because the usual fallbacks are missing. Cards issued outside the country generally do not work in Russian shops, ATMs or apps, so you cannot simply pay for something online on landing, and a Russian prepaid SIM requires passport registration at an operator shop before it will work.
Meanwhile the trip itself assumes a connected phone. Moscow's metro is enormous and best navigated by app, intercity trains between Moscow and Saint Petersburg are ticketed digitally, and translation is a constant companion for menus and station signage in Cyrillic. Landing at Sheremetyevo (SVO), Domodedovo (DME) or Pulkovo (LED) with a working data line already installed avoids a queue at an operator counter and a document check before you have even reached the city.

