Gotta say I’m surprised to see Spotify adding something people actually want. It must be getting rough for them.
I might be out of the loop. Who wants this exactly? There is no audible benefit from lossless audio. I rip all my music to lossless files but that’s archival. There’s nothing to archive with streaming services.

I want this, and although there isn’t always a perceptible difference in audio quality, there sometimes can be. It depends on the content, and I’d rather sometimes stream audio at an excessively high bitrate than always lose the high–end definition that I could have enjoyed where it exists.

All my life I’ve been getting into disagreements with people who believe that because they can’t tell the difference between A and B, I must not be able to either. I find this immensely frustrating.

I agree. I can definitely hear a difference, mostly in the rhythm section and low end.
You can hear a difference between 320 kbps mp3/aac/vorbis and lossless? Can you prove that with an ABX test?
I notice the difference with an ABX test. Spent about $700 or so on my audio equipment, so I guess it is “budget” in the audiophile world.

What equipment do you have? My main setup is a Motu M4 with two Adam Audio T5V and multi point room correction done in REW. For headphones I’m mostly using DT 770 Pro 80 Ohm (there’s different drivers depending on the impedance and these sound warmer). I also have a sizeable collection of IEMs with ratings up to a B- on the crin list.

I can hear sounds up to about 16k. I cannot differentiate good lossy encodes from lossless audio.