B2B industrial contracts in bitcoin

Any experience of tangible assets businesses signing long term (3+ year) contracts in BTC? Even if both sides believe in bitcoin and ready to sign a long-term contract in BTC effectively it means that they assume the volatility risks since the suppliers and the employees are not paid in BTC. I understand how services can accept BTC payments or retail businesses setting up BTC spot pricing though can't figure out how in my case corporations can agree on long-term payments with the exchange rates can go either way. My guess is for such long-term real-life operations it's not the time yet but would appreciate if somebody can share ideas or real life experience.