I played a lot as a kid but was never any good. I gave it up at around 20 and didn't touch a club again until around age 36. Now I'm age 40 and in the last 2 years have made fantastic stride in my swing. I am the poster-boy for the middle aged guy with no time to play golf. I have 2 little kids, a wife and my own business. Last I played actual golf was early 2013.
However, I have a net and a matt in my garage and I go out there and hit balls a lot. I can step out and just hit 5 or 10 if I want to. Because I play no actual golf, I can't tell you how much lower my score is now, but my swing is a million times better. 2 years ago I was a chronic slicer. My drives would go about 175 with a big slice. My irons stank royally - short, cruddy trajectory . .and that was when I hit it well.
I don't get out to the actual range much - but I went the other week and was driving around 250-260. My 7 irons were right around 165. Most of my shots draw to some degree. I still can't draw or fade on demand. I still can't control trajectory - but my trajectory and ball flight are much, much better.
I had a lesson today, first one in almost a year, and got to see my swing on video for the first time in a long time and I was shocked at how much good stuff there is going in it now.