Ice Age came out in the summer of 1995
This is how The First Sliver is perfect for Sliver decks, as it uses cascade to get as many slivers out as possible as fast as you can
If the biggest drawbacks you cite are that it doesn't hit all cards in a graveyard and the second activated ability costs too much, I'll take those drawbacks when I have the chance to recur the artifact with a Myr Retriever
So when it comes to getting out the appropriate top loaders and magnetic holders, some trial and error might ensue
It can buff the heck out of a really wide board, but it also makes all of your future Humans good, too
There is alot of different decks in my EDH community like Ghost Council of Orzhova , Aurelia, the Warleader and pretty much tryhard decks like that, and I've got alot of positive comeback from this piece