i've been dealing with this too since 2007. i only played at the christmas /new years eve party here at my community . so in 12 years i've played no more than maybe 4 hours total. other than jamming in my little office studio, i dont play. i lost my voice due to not performing (use to be a decent singer).
one thing i noticed is when i changed over to arranger playing, it seems that i became a better one man band / duo musician as far as sounding like a full band. but my musician skills went down hill. i became lazy ,let the arranger do the bass lines instead of me playing bass pedals . my left hand bass/chording skills got weaker. now dont get me wrong , i'm not blaming the arranger. i became robotic in playing, lost my passion. i never really care for playing front of people , i use to love studio work and creating stuff. but now after years of playing i feel the same. just cant get into it. funny thing is that i'm always looking for equipment to buy that i wont ever play after i get it.
so here's my thinking, im leaving my stuff set up so i can play for that song or two. then i decided that i'm not going to feel guilty for not wanting to play anymore. at my age (73) i'm not going to stress about it like i use to. so go buy that motorcycle,bike,boat,or just let it go and go do something thats different , its OK at my age.