What link? This is well known. Toady refuses to implement anything past the middle ages (with a few exceptions), as he dislikes steampunk dwarves and so forth.
So the first electrostatic generator was made in the 1660's, but steel was first commercially produced in the 1800's. Avoiding the Baghdad battery issue right now, let's discuss that the Egyptians, Greeks, Romans and Arabs knew of electricity and its conductivity through metals before 0AD. The Greeks were using shocks from electric fish to try and cure headaches and gout.
Magnetism was a well known effect, in the beginning of the iron age. Why? Because non-quenched iron becomes magnetic along its length.
Please, if you're going to try and put something down at least provide the F-ing link to a quote by Toady explicitly refusing to implement electricity and not BS us with a claim that he refuses to implement anything beyond the middle ages. Besides the fact that there's steel, perpetual motion, adamantium, etc that makes no sense in a 'middle age' setting.
We're discussing a material property here. Even if he doesn't want to provide a use for electricity in the game it should still be in the game for a simple lightning system. Rain provides no danger in the game, when it should be accompanied by lightning and Dwarves being ground-dwelling creatures should be at risk if they're not properly building their caves. Above-ground Dwarves should be at risk of their wooden forts being struck with lightning and burning to the ground. You know
the real risks medieval societies faced.
Modders could work with the rest so long as the base implementation is included. Toady obviously wants people to mod this game to their own liking, it's the only way to get good feedback, development and bug finding, so simply implementing the base system would allow us to mod it to our own liking and make everyone happy.
Like I said, Electricity can easily be a deniable aspect of the game. I've built forts without using waterwheels. I've had dwarves fill a reservoir at Z+20 from ground level by bucket because I didn't want to build the pumpstack and be using perpetual motion, and I didn't feel like making a massive windfarm in an area producing 20 power as I'd lose it all through gear mechanisms.
The Power element as is is completely deniable in game. You can build a wooden fort in a serene area and live off of above ground farming and survive off of leather and crossbows. Or you can ignore the entire wood economy by digging deep and finding magma. A single Dwarf can move Magma up a pumpstack if you take the time and you could ignore perpetual motion in the same.
I want this to be a discussion about how to make Electricity fit into DF, you obviously don't intend to help and you're not even making the effort to shoot me down properly. So either contribute or shut up because you blatantly have no valuable input so far. If you want this shot down, get Toady to say a simple "No", it's not going to be that hard if he's as vehemently against it like you claim.