Earlier quoted context omitted.
A strip is not a "cheaper" steak than a filet. Filet mignon is a fine cut, it's low in flavor but very tender which means that it tastes better when it's extra rare. Well marbled cuts of steak are usually better at mid-rare b/c the fat melts a little. I do like sous vide for very thick steaks with some marbling—so a strip is a pretty decent one for the dip. However, I've found ribeyes come out spongey when you sous v…
Filets absolutely can be and are dry aged. They're again just even more expensive than a dry aged strip steak. A filet is almost always more expensive than a strip, in the supermarket, at the butcher, or in the steakhouse.
Even as someone that has a dedicated dry aging unit, I don't know that I would recommend dry aging filet. I don't count the pellicle as waste, since I make use of all of it, but you do have to cut off a decent chunk - it's too tough to eat on the steak itself. The end result is that you just don't have a whole lot of steak left over.
You might see "dry aged" stuff for 2-3 weeks, and there's significantly less pellicle, but it's not nearly the same thing as something that goes for 60+ days.