Studio time and regular time are not the same...the former passes twice as fast as the latter, especially if the studio has few windows.
I limit mine to a few hours a week. We've been using the Tyros4 a lot, mainly for quick laying down of bass and drums tracks...we are doing demos for budding song writers...time is money, and they don't have much of the latter.
At 65 years old, I continue to work harder on the art of laziness while still thoroughly absorbed in the art of music.
Keep your stick on the ice, Russ. You don't need to grow up, but if you want to keep playing and being happy...you do need to grow older.