However, my first three albums: Weather Patterns, Mechanical Bull, and Good Night, Fahrenheit (all released in June 2017) each contain multiple tracks that feature a glockenspiel in the background. As I could not tune this instrument to 432 hz, I ended up tuning everything else to the standard 440 ("concert pitch") to match it. Even though the glockenspiel is not in all of the songs, for the sake of continuity, every instrument on these albums is tuned as if it was.
Conversely, on my three more recent albums: Better Days (2019), Embers (2021), and Petrichor (2021), everything is tuned to A=432 hz. This rendered the pitch correction in GarageBand virtually useless, but I was able to figure out a workaround that I used on some of the backing vocal tracks. Whenever I perform live, even though I often play tracks from my first three albums, my instruments are always in scientific tuning.
There is a lot of debate about whether or not -8 hz really makes a difference. Personally, I think that it's subtle, but to my ear, it does sound better than concert tuning. As a one-man-band, since I don't have to worry about making sure that my bandmates are all in tune with me, I just do what sounds good to me. That more or less describes my general approach to songwriting as well.