So you had a shutter let go at just shy of 60k. It happens. You're not the first and won't be the last.
Plenty of people on this forum have had a shutter go at much less than that, and even more have had them go at way beyond that and their estimated life expectancy. It's NOT a guaranteed number.
It's the luck of the draw.
I've done three. Fortunately, the two on my 10D were well beyond the rated life - about 160k and 120k. My 1D MkII was just shy of the 200k rating. I got lucky, you didn't - move on.
The fact is, most people will upgrade or get rid of their camera way before the shutter lets go, so for them, it's a non issue.
A shutter is a mechanical part and can fail at anytime - expect that it will happen.
Just like driving a car - expect that at some stage you will have a crash.
You hope it doesn't happen, but it can.
Do you switch brands because you crashed?
Usually not would be my guess.
If you feel better making the switch to Nikon, go ahead.
You'll be disappointed to find that the same thing probably applies.