I've been playing for about 24 years now. Ya know how I can tell my interest hasn't faded yet? Because I live in NY, and we're forced to take a few months off every year for the weather. And during those months off I go nuts wishing I could get out and play golf.
In some ways the forced break is a good thing. I imagine it keeps me from burning out.
If you ever feel like your interest is fading away, I would invite you to come up north where this past week it was -50C with the Windchill. I am sure that will give you a swift kick in the butt to grab your sticks and go play.
Mine has as far as casual golf. Can't stand it. Unless its an amazing course. Still love to compete though. Basically don't practice either #facepalm.
For me it has as far as playing. I still practice some and constantly try new clubs and work on them as I enjoy doing it. But its a time factor and changing interest. Played college golf and now I can still hit it about as well but that is due to equipment. I feel with time my short game could get where I could still be a low single digit hc. But I don't want to spend the time to get there and I don't enjoy it when guys are beating me that in my eye aren't very good. Other thing is other interest. I have started welding and gotten into bow hunting. Both I really like and do not take as much time. Maybe when I retire things may change, but right now there is only so much you can do on a weekend and between making grand kids events and things needed around the house, its hard for me to justify 5 hours to play. But I still do enjoy going to the range for and hour or so.
My interest in golf has faded the last few years. I used to play probably around 100 rounds a year. Personal things came up and I'm just not able to play that much anymore. I don't think I even played 10 times last year. So far this year I've played twice, but I am playing a scramble tournament on Saturday. I have a way of taking all the fun out of my hobbies. When I can't perform to a certain level I just don't want to do it and I'm often unwilling or unable to put in the time to get me to that level of performance. I know it's a character flaw. Hopefully someday I can get over it and can just enjoy doing things.
I find that at age 66 my enthusiasm for the game has increased not faded.