I use a CED Millinium when testing loads or working with a wildcat or cartridges that have little published load data or, a powder that is not listed in that data.
Being a paper puncer with a max range of 200 yds. I'm not as concerned with velocities as I am with accuracy and consistency. The 1st thing I look at is the standard deviation.

However, when working with the above mentioned cartridges the velocity readings at least let me know if I'm in the ball park with the load combo I'm using. If readings are irratic or running a little high/low it gives me an idea of where I'm at and what I should look at when I get back to the loading bench. It's better than taking a guess and a chance when working with something that has the potential to cause damage.

Then again, when publishing a test people want to know all the detail possible and that includes velocity, extreme spreads and standard deviations. Besides, who would give up the opportunity to play with new toys