Is the bean grinder better by hand or by electric? Is it better to grind coffee beans by hand or by machine?

When we are going to buy a bean grinder, should we buy an electric one or a manual one? First of all, we need to know what kind of coffee we want to make, whether it's hand-brewed coffee or espresso, or a mocha kettle. Because they have different degrees of grinding, this is very relevant. Because I have used hand grinding to grind espresso beans, to grind espresso to the right grinding degree, I found that the third cup hand will soon cramp, because it is ground into a very fine powder, which is very difficult to grind, but if we grind it, its grinding degree will be rough, it will not be very tired, and it will be fine to grind a lot of cups. If it is concentrated, the grinding degree of each coffee bean may be different, so we need to adjust the grinding degree of coffee frequently. The powder of the mocha pot will be thicker than that of Italian concentrate, or we can do a part-time job with a manual bean grinder. if we want to do Italian concentration, it is recommended to use an electric bean grinder. It's not that you can't grind it by hand, it's just that the efficiency of grinding fine powder by hand mill is too low, and it's very tiring. Finally, there is the problem of price. The quality of hand mill is better than that of electric mill in the range of 100 to 2000 yuan. But the price range of hand mill products is here, and the quality of electric bean grinder will be higher if you go up.