Specifically at mid elo, I hardly (if ever) see them.
Considering Age of Noobs video The Choice of Landsknechts over Man-at-Arms! - YouTube, back in the day, and how effective Landsnakes are, I wonder why Im not seeing them more. If anything sharks might even be stronger nowadays (aside from the gold economy nerf) .
I use them a ton, and if the opponent doesnt make ranged units, its always a one sided fight.
That being said, does anyone know of any further videos with analysis of sharks? More recent or with more comparisons?