Snow flakes - meet reality  .-)

As for -15C that is not that extreme - try the wilderness at -30C ..... been there and you had better bring some matches and proper winter gear.

The sleepless nights - industrial reality is that once in a while a $100 million project will be driven into the swamp of circumstances, and it then becomes a matter of all hands on deck, no matter what it takes. Been there and if you cannot deal with and manage the stress you will not succeed in busines. It may not look pretty at the time but customers and investors rely on your performance and could care less about personal foibles. Snowflakes need not apply .... ( even at -30C  .-)