The problem is around here everyone equates 30 to the age where you're no longer good at hockey and will only be a waste of money for any team wanting to sign you.
I think the issue to a guy signed long term after 30, is almost every guy deteriorates year over year.
So your trading for an asset that has already peaked.
The gamble is if its gonna be a Thorton/ Marleau type decline where at 38 they are still NHLers, Jagr type who at almost 40 was still dominant, a Lecavier type who just allnofnthensudden sucks, or somewhere around the average where they just get a bit worse every year.
Imo, Kane will be fine going forward it's the cap hit that will scare teams off. I dunno if a 35 year old P Kane will be worth 10.5, same as a Leafs fan the last year or two of Tavares might be a cap suck