Hi simon,
you are absolutely right, many many times! 
And there are even more answers to the question!
It all depends on what you want and/or need.
If I am sure of anything, then that there is no one-fits-all solution.
For example I am lately more and more convinced that a full frame camera is not the best choice for all purposes because the larger the sensor, the shallower your DOF will be. And especially with spacially difficult objects that can be quite an issue. I only noticed this because I gradually movend to larger sensors and came across difficulties I never had just because of that.
And finally the easy one: If you shoot from a tripod, then turn IS off!