I have even gone as far as importing knives from other countries to try new steels. It's a lot easier and more common to try new steels than it used to be. Sal and Spyderco have really contributed to the cause ( I hesitate to call us "steel junkies" anymore since it has become almost mainstream to have that quest for performance). Sal and the Spyderco team have really gone out of their way to bring new, higher performing steels to the production world , then even came out with the "mule" concept of running them on the same platform to make not only comparisons easier, but gripping, sheathing and even modding them easier to the point people often think of them as kit knives now.
The Mule team will run the steels for best performance which sometimes is different heat treat schedules and final hardness specs that would be used on a straight production knife. In addition to all of the above Sal has brought in not only new ( to the cutlery world anyway) steels but old well known reference standards like 52100, S90V, etc. to help keeping things in perspective.
Running the program at very little markup over costs using production time that could be used to make others that have a higher margin, along with the steels and even heat treats selected show in my opinion that Sal has a real passion for making knives, likes learning and sharing knowledge with others.
These traits more than the yearly release of new models to keep the lineup fresh and current with market demands are what puts Sal in a select group of knife makers that have shaped and driven the whole knife industry and given us innovation after innovation, and brought new generations into the ranks of us collectors and knife users.
It's rubbed off on most all other knife manufacturers and most all of them, even traditional makers have their sport or performance models.
Gerber making the first "sprint runs" in steels like Vascowear ( Gerber "V" steel), M2 HSS, as well as L6 ) started a fire and it just gets hotter and hotter with production knives in ZDP 189, M390, S90V, S110V, CPM M4, Mastiffwe...er, Cruwear, etc.
I don't have to send away for knives anymore. Now production knives often outperform custom knives when it comes to cutting and most everything else.