The city infrastructure
Moscow is located only 10 degrees Northern latitude away from the Arctic circle, winter here usually lasts 5-6 months, so all the city infrastructure is set up to cope with cold and snow. Planes land and take off, traffic flows, and snow falls do not disrupt everyday activities because the city has a fleet of snow ploughs constantly working on the streets clearing the snow away. All the public transportation and even infrastructure such as outdoor ATMs and ticket machines are designed to work in -30C, not to mention the famous Moscow metro located deep underground where it is always warm. Hotels, restaurants, museums, and homes have very good heating systems, and the problem usually is that it's too warm inside – and here we come back to the issue of putting together a smart set of clothes, that is, wearing layers (like a shirt, sweater, vest, cardigan, scarf, down jacket or coat with a hood, etc.) that you put on when you step outside, and gradually take off when you are inside.
Even the Radisson boat fleet has its own icebreaker, and taking a cruise along the frozen river past the snow drifted sights and locations is quite an experience.