apt is not the only package manager on Linux. At least you have abundant choices as to what you can use. As always on Linux, for about everything, there are tons of ways to do it.
And homebrew isn't the only package manager on OSX.
I actually see this as an argument in favour of OSX, as it is much more straightforward to change package manager than on Linux, where the sane way to change package manager is to change your distribution.
