Whenever discussions of Soylent come up, I always wonder - would the same people who want to take Soylent also agree to taking a people that made their sex drive disappear? It will definitely save time and money to not have to worry about sex, after all.
NOTE: This is not a pro- or anti- Soylent sentiment, it's a mind experiment.
But other differences are that: lots of the food you eat when you have no time (microwaveable dinners, tacos, fast food) is really really unhealthy for you. Relieving yourself sexually in the normal way is never unhealthy for for you (and is actually quite healthy). Quenching hunger also takes hours and costs money. Sexual release can be quick, and is free.
I've never heard anyone say that sex is a chore, but I often feel that way cooking food that I don't want to eat, but have to because I'm hungry.
I really hope that reading the word "sex" in a [thoroughly unsexy] hacker news comment wouldn't get anyone fired.