Recent mechanical engineering grad here, I use my (new model) 35s on a daily basis. Despite being somewhat cheaply built ('5' button broke early, still works bu

Recent mechanical engineering grad here, I use my (new model) 35s on a daily basis. Despite being somewhat cheaply built ('5' button broke early, still works but now wiggles around), I couldn't do without physical buttons and especially RPN. I'm also a heavy user of python for data crunching, but they're just different tools for different jobs. Now, that DM-15L is tempting. Bit expensive, but tempting. A boss of mine, during a co-op internship, still had an original 15c on his desk and banged on it daily. Great engineer. As a last aside, for a terminal RPN calc app, my favorite has been 'orpie' for a while, check it out, I think it's built in Ocaml too, which should satisfy HN FP-fetishists.