Yep, i agree Pogo.
I am now gradually treating DL like an old fashioned loudness button, in as much as the louder i play my music ( all types actually ) the flatter the target curve Is needed to create a more realistic reproduction of the performance.
Daytime, and home alone, i have a very flat target across the freq spectrum and I am not wanting for bass or for top end detail as the volume is good, high and full.
Come evenings and with SWMBO nearby, I earn extra brownie points by choosing her music and reducing the volume. My target curve now has to be the NAD target curve (extra bass ) with a bit extra hf added by me to help my old age hf losses.
BTW turn off DL and for me everything seems flatter, notes missing, boomy notes producing headaches. So I don’t switch off DL unless…
…I still have friends who prefer it when I don't use DL. I guess their ears are so used to room effects that familiar pieces of music do/will sound strange to them.
DL appreciation does take time.