That is definitely a personal preference in one of the big controversies. You have to decide what works best for you. I have not used backing tracks, but I’ve considered it, particularly to add percussion and possibly Bass. The thing is, if you’re playing through a song in a certain way, the backing track will work. However, particularly at memory care, if the residents are getting into a particular song, the chorus of a song, such as “you are my sunshine“ or “ take me home country roads“ numerous times as long as I felt the energy in the room. The song that they remember is typically the chorus, not the verses. Tracks, your sort of tied to a particular arrangement of particular duration. Another option I saw recently was a keyboard that had a beat buddy drum machine. The drum machine added percussion to the song and he could repeat whatever he wanted as long as he wanted, and then at the end of the song he used the volume pedal to turn off the percussion. I am considering that. Then again, at the assisted-living facility where I play, one of the most popular acts is a man who’s just sings to backing tracks, mostly “crooner” sort of songs, such as Sinatra . He is basically doing karaoke, but he gets a bigger crowd and more applause than those of us that are strumming a guitar or playing a piano and singing for an hour. Therefore, there really is no one right answer for everybody. By the way, Another thing I saw recently on Frank Persico’s YouTube channel is a Roland stomp pedal. Every time you tap the pedal with your foot you get a nice drum sound. This allows you to add some percussion to your act without being tied to any sort of “canned“ sounds. There are options out there. Ignore those who say there is only one right way to do it.