I've only been shaving with a straight for about 9-10 months, and in that time I did go back to the cartridge razor while on a cruise... I didn't want to risk using the straight while being rocked by waves, or in such a cramped washroom with barely any counter space.

Looking in to the future, I'll be going back to school for a post-grad starting in January, and I expect I'll be very busy with long days of studying and homework. I'm not sure yet if I'll choose to sleep an extra 15 minutes in the morning and just shave with a cartridge razor.