I use what I thought was dimensional analysis very often after learning about it 10+ years ago during my Physics studies. It's a very powerful technique to both check that your equations are correct (i.e. do the same equations but just with the concrete dimensions and you should end up matching with the dimensions of your result) and checking you have correctly carried the magnitudes (kilo, giga, etc.).

I've never seen dimensional analysis without using concrete dimensions, so this blog post was really eye opening. It seems a little magic to me, so I'm interested to learn more about a quick and helpful technique I thought I mastered.