also, some people don't actually know how long or how many people are required to deliver some given set of features

i had a manager ask me regarding someone else's work that was recently released if it reflected anything on my and my colleague's work on replicatr and the simple fact is the other project had several years going into it, and 5 workers, and i was just me and a junior on his first project... it needs another two months and probably another set of eyes running the tests and ironing out its resource leak bugs, which already i squashed 3 of them leading up to the final release

can't make a house without enough bricks and rebars and cement and tiles and windows and doors, and if you only have two guys working on it that will take more than twice as long as having 4 due to efficiencies of parallelism