Updated my comment for clarity - yes, SQL Server and Windows for their .NET app. Maybe they've moved to Linux if they have finished their migration to .NET Core, but even if they did, it's a fairly recent thing.
License costs are peanuts in traditional enterprise bugdgets, when mapped across the overall costs of developer salaries, contracting, designer agencies, travel expenses,....
It's not about the travel specifically, it's that servers and licenses are the cheapest cost of any company when compared to salaries, especially for engineering and sales.
