

I recommend you gnu parallel. It does similar things, but runs the commands in parallel. And it’s way easier to pipe than xargs. If you really need it to run one command at a time you can give number of cores to 1. And it also has progress bars, colors to differentiate stdout fo different commands, etc.
Basic example: to echo each line
parallel echo < somefile.txt
To download all links, number of jobs 4, show progress
parallel -j 4 --bar ''curl -O" < links.txt
You can do lot more stuffs with inputs, like placing them wherever with {}, numbers ({1} is first) that allow multiple unique arguments, transformers like remove extension, remove parent path, etc. worth learning

Considering they just hold back packages, but do not do additional testing to release them, yeah, they should not do that.
Arch already has testing repo, normal repo packages on arch are already stable enough