I think practicing piano is great if you are a piano player. I never played piano since a year or so of lessons when I was about seven.
Playing trumpet, guitar and drums when I was younger was much more "instrumental" in my development as a semi-accomplished arranger artist.
Since I was inadvertantly thrust into the role of vocalist (the real singer didn't show up and I wanted to get paid) the organ and then arrangers became my backing ensemble. I discovered early in my career that it was more lucrative to keep all the money than to split it four or five ways with an ever-changing cast of band members. As arrangers developed and became a viable force in music, even if most people didn't know it, arrangers were a perfect fit for me.
There are definite advantages to keeping an arranger for many years. I find there are more advantages to keeping up with the latest innovations offered by keeping a fairly current model. An informed buyer can purchase a new arranger, use it for a couple of years and sell it for close to the original purchase price. There are legions of fairly UN-informed buyers.
There are also advantages to depreciating gear for tax purposes that can make it cost-effective to upgrade periodically.
Plus I LOVE getting new stuff!