I've just been doing some sums concerning a business trip in October.
Home to place of business is about 700 miles, plus the Channel Tunnel. Drive down to Strasbourg, night in an hotel, drive on the next day... Same coming back. Add a bit of a holiday as well as I'll be there for around 10 days.
Or home to BHX, leave car for 10 days, suffer security restrictions, wonder whether essential luggage will arrive.....
If petrol, Eurotunnel and motorway costs and 2 extra nights in a hotel will be less than the £1027 it would cost to drive to the airport, park for 10 days, fly, then I shall probably drive - because of the security of my essential business requirements.
I'm sure many other business travellers are doing the same analysis.