I do. It is by far the most portable way of doing things, if not the most reliable (but it may also slow things a lot). When someone asks me to help debugging i

I do. It is by far the most portable way of doing things, if not the most reliable (but it may also slow things a lot). When someone asks me to help debugging in unknown language, on unknown platform, the first thing I ask is: "how do I printf here". Most of the problems are traceable this way. It is VERY rarely a low-level (reg/stack/mem/system) fault.