There were. Some of the ideas were good, and eventually took off, some were good-ish but needed more development (aircraft and tanks, for example), and some just didn't work. But to this disinterested observer, nothing really worked well enough.
But mostly, the war ended when the governments and economies of the nations fighting could no longer withstand the strain and started collapsing. (Russia is the most obvious example; Austria-Hungary and the Ottoman Empire were sketchy going in; Germany and France were the military superpowers but Germany finally fell apart with France about this far > < from large scale mutinies. Oh, and Britain finally paid off its WWI loans in like 2015.)