I do not say - everyday.

But 3 hours one way - possible.

It depends on the route. If it is a scenic asphalt route protected from wind by houses or trees, I would try it.

My commute is miserably short - 5 miles one way. Sometimes I cycle in the morning before breakfast about 60 km on the asphalt trail. I get up at 5 o'clock for this. This is the best time. The city is almost empty at that time.

So, if FOG's work starts, say, at 9, it is possible to have everything set and ready from the evening, go to bed at 21:00, get up at 05:00, hit the road at 05:30 and be near the gym at 08:30 and at the office at 09:00.

40 miles is 64 km, it means that the average speed should be about 20 km/h to make it in 3 hours. But 20 km/h is not fast. On Tour de France they cycle with the average speed 49 km/h. I do not say 49, but 30 km/h is realistic after some practice.

So it could be reduced after some time to 2 hours one way. 2 - 3 times per week when the weather is OK, - why not.

All depends on the route.