How often do you use coding algorithms in the products you build?

It really depends on the kind of software you're writing. On one end of the spectrum, you've got run-of-the-mill data-driven CRUD apps. On the other end, you've got compilers and databases and such. I've worked on both, and I can say that when you're on the CRUD side of the equation (i.e. the side where you make money instead of fawning over CS theory! :P), it's true that more advanced algos are less common ... because you're typically just importing libraries that do the hard stuff for you.