Usually we store images at 3.5 - 5 BPP (Cameras), 10+ BPP (Raw or similar for editing) and 1-2 BPP for internet user.
The actual bitrates depend a lot on the image -- graphics with simple backgrounds need less, photos with a lot of sky need less, busy detailed images particularly nature needs more.
While there is one 1.0 in the test, it is for an extremely busy image which would be better stored for internet use at 3+ BPP.
0.22 BPP is almost never used for photographs in the Internet.
You're probably aware of this, but the comparison tool allows selecting larger images. That first image is 3 bpp if you select "large".
> Usually we store images at 3.5 - 5 BPP (Cameras)
That's appropriate for JPEGs, but given that more recent compression algorithms do a better job, it's probably worth looking at lower bitrates. I pulled some JPEGs off my Canon DSLR for example, and they're around 2-4 bpp for landscape photos.
It's not surprising to see acceptable JPEG XL images with half that bitrate.
Usually we store images at 3.5 - 5 BPP (Cameras), 10+ BPP (Raw or similar for editing) and 1-2 BPP for internet user.
The actual bitrates depend a lot on the image -- graphics with simple backgrounds need less, photos with a lot of sky need less, busy detailed images particularly nature needs more.
While there is one 1.0 in the test, it is for an extremely busy image which would be better stored for internet use at 3+ BPP.
0.22 BPP is almost never used for photographs in the Internet.
See https://almanac.httparchive.org/en/2022/media#fig-15 for median bitrates in 2022 (1.0, 1.4 and 2.1 BPP for lossy formats)