I agree. To me I see that as detrimental as Imperial vs SI units. Things would function much more smoothly if everything was uniform (and preferably SI units).

For reference I'm a mechanical engineer and have heard endless stories of delays, critical failures, and manufacturing errors due to confusion with units. Either they weren't specified and were incorrectly assumed, or a single part out of hundreds is in a different unit and overlooked, or tests were performed incorrectly due to this confusion. It's no good and if it can be avoided then it should.