>The advantage is not having to remember all those funny constants This, very much! I've done a ton of physical simulation code in my life. Whenever some newb

>The advantage is not having to remember all those funny constants This, very much! I've done a ton of physical simulation code in my life. Whenever some newb or student comes to me for the first time with their simulation code that mysteriously doesn't work, in 90% of cases they stupidly didn't stick to SI and forked up some unit conversion, or mutiple. I tell the to keep it in SI and never let me see them make that mistake again. (Only exception is simple 1-to-1 unit conversions of parameters and results, when some stupid interface definition demands it that can't easily be changed.)