Conscription was introduced by the Revolutionary governments and improved by the 1798 Jourdan Law. Napoleon used it as it was already in force.
What's your point? Conscription was bad? Give us a break. It also introduced people of all classes and backgrounds to the army which greatly improved it.
As Daru remarked: '[Conscription] is an ineluctable consequence of political equality. If you demand equality, then accept the consequences.'
The Austrians and Russians both used forms of conscription.
Great Britain did not as it hired the continental powers to do most of the heavy lifting during the wars.