Huh, my eyes completely passed over that missing letter. Does this mean that EndeavourOS’ version of yay is somehow special to EndeavourOS, or that the EndeavourOS team decided that normal yay is completely satisfactory, making UpdateInTerminal redundant?
We use the same yay you can build from the AUR. Basically it was decided that what yay and paru do is close enough to what UpdateInTerminal was doing that it wasn’t worth continuing to maintain something separate.
It only a single script. Removing it abruptly would probably not be a great thing to do to the community. Instead, it is deprecated to let people know it is going away and then it will be removed in the future. This is fairly common practice.
It is part of eos-bash-shared which many of the EOS tools rely on. If you wait, it will be removed on it’s own when the time is right.