I've found contentment in most of my equipment based interests. My curiosity hasn't died. I still try new things and consider them but generally circle back to the same things.
My thinking... I think gear meets different needs for different people. For some, gear is more about self worth as defined by where they fit. Most "what is the best..." threads about most gear in most forums is rooted in this need.
For others, self-worth is more rooted in their doing and since the doing is so different, they tend to return to highly personal tried and true solutions to their own, highly personal mix of doing.
For yet others, self-worth is a mixture of these two.
Perhaps you're moving more into self-worth formed by your doing and less on what others tell you?
All I can say to that is you aren't alone and it's OK.