Many PC laptop keyboards have full-size keys for all four arrows. Tiny keys for a feature I use so frequently is user-hostile, whether it's 2 or 4 of them.
It’s not about the size for me. Sure the full height inverted T is easy to use. The half height inverted T also works. But the one that isn’t inverted T is difficult.
They also usually have an awful-looking extra row just for the arrow keys. And FWIW, I find that the inverted-T arrangement is even easier to quickly find by touch than full-height arrow keys.
