Reefers have been using automated systems for as far back as I can remember, their origins simply didn't involve wifi. But reefers do so out of necessity, not because they are more advanced than fresh. Most freshwater systems simply do not require the same type of advanced (ie costly) set ups as marine, be it lighting, chillers, reactors, etc. My philosophy in this hobby has always been one of KISS, for the exact reason just stated;
you don't get my point, I am bashing on people who just blindly refusing to advance in the hobby and accept whatever they have is the norm, and put out salty comments to stop others doing so. wifi or not I always hear comments such as. "oh I did this for x amount of years and I think this is the best way to do things. you never know these device is going to fail blablabla, it's only been out for x amount of time"
in real life, these controllers (other automation gear) is been in the market for a long time...
it is just people being stubborn and not willing to accept new things while being proud of it, kind of hilarious. there is a huge difference between simply believed past experiences is the golden rule for everything vs acknowledging there is a more advanced way to keep freshwater aquarium and not proceeding to invest because of the cost or the knowledge required.
Btw typically reef keeping is more advanced in terms of the amount of knowledge you need to keep a successful system.
on the surface level, there are more water parameter variables to consider, and if we dive deeper like you mentioned ramping up and down lighting and reactor to improve water quality, dosing pump to stabilize and supplementing the needs of the corals, c02 reactor, etc.
But a reef tank can be set up without any automation you can do all of that by hand( or something like my upcoming project: an algae scrubber filter only SPS dominant system, let's see how it goes.....), is just more work needed to be done, like a lot..... which is why it encourages reef keepers to invest in automation gears to a point it becomes the norm.
As for the cost, like i said there are the high-end product that cost 2k like the apex or mass-produces product like your typical wifi strip/plug or custom setup such as Reef Pi, if you are willing to put some work.
do you know why i have time to type all of this?
because of idiots that are using their past experience as their only reference instead of learning new things. such as people who believe Covid-19 is a type of flu and use this isolation time as a holiday. our world is evolving so should we, fish keeping is just reflecting some of these aspects