That reminds the "rifle nightmare" of the Russian Defense Ministry (1860s-1870s). Every new rifle system accepted was entirely obsolete the next year. By the time of Russo-Turkish war, the army had 10-20 completely different rifle systems in use. That was over in 1891 when Mosin-Nagant was introduced. That one was in use for 60 years, including both World Wars. (Germans had highly similar Mauser rifles.)

When the paradigm is changing, investing is risky.