Let's face it, hard drives tend to be huge nowadays, but we are all experts at filling them up anyway. At least wd_multi does not itself add to that burden in itself - a couple of kB each instance until you start working on them of course and filling them up too
I note some comments posted elsewhere that we are not focussing enough on reducing RAM and CPU in terms of efficiency. I can only wonder, if that is really so important in the scheme of things, why the mainstream distros that most people actually use out there in the greater Linux world are not(???) doing that fine tuning as part of the overall Linux development process. I don't myself actually like pretending I have any kind of kernel expert capability in such matters; I would admit freely that if I mucked with kernel tuning or RAM tuning matters I would no doubt be messing with the overall Linux design, which was done by people far more expert than myself. Not saying I couldn't reduce a few MB of RAM here or there or even a few CPU cycles, but not worth the effort in my overall lacking ambitions in that fine grained detail pursuit.
Still I'm happy that someone is so inclined. Next time I drag my Pentium M out of the cupboard for a laugh I'll see if anything can still run on it. In my tests I don't notice a terrible amount of difference on my own computers (which are neither very new or old) no matter which forum distro I use (aside from desktop environment slow down effects and a of course the plus or minus a few hundred MB of RAM consumed on initial boot, which nevertheless effects my computer usage not at all in meaningful practice.........?????!!!! Yes, I know it is another hobby matter for some).
Nevertheless, maybe someone should test all the distros and see just how badly we all do in that nitty gritty of find grained efficiency. How much RAM do we waste as say a percentage of all the RAM available on our machines, and similarly for CPU. I just can't be bothered though and care more about flexibility, reliability and stability overall. I did find some recent KDE Plasma Wayland-based distros surprisingly nippy compared to what I remembered with KDE on X, but that's a different matter.
Apparently, there is something wrong with similarity, and thus a big push for 'uniqueness' - maybe we should move to BSD from Linux and GNU??? Well, seems everyone in the world should be using EasyOS, FatDog, or Vanilla Dpup because of uniqueness value if that is why you use a computer(?). I almost feel left out, because I instinctively like 'standards' and the reliability and certainty that helps to achieve.