LegoBlockShell

The pixel dimensions and scaling didn't work out so well, it was really awkward. Scaling to the same UI size as the MacBook Pro 13" and 15" the display showed scaling artifacts a screen door effect. When scaling to native resolution the UI elements were far too big and there wasn't enough screen space. The new 4K will scale much better to the MacBook UI sizes.

There was a firmware update for the LG Screen Manager that stated "additional monitor model (24MD4KL, 27MD5KL) (internal logic was changed)". This monitor is on the Apple website here https://www.apple.com/shop/product/HMUA2/lg-ultrafine-4k-dis... that's the 24MD4KL-B.AUSA. Probably just waiting for the new Ultrafine 5K displays to arrive, these panels are difficult to manufacture.

It also explains why Apple didn't do a 27" Apple Pro Display XDR and just went ahead with the 32". They still intend on having the LG monitors as "budget" mainstream options. If you look at the design of the Apple Pro Display XDR it's obvious LG was involved in it's design and manufacturing. Even the USB-C port placement is identical to the 4K/5K just on the other side.