It does allow for many stores selling supplies, you can get anything your heart desires, seeds and clones become more available, it is accepted more by the gen pop, there are fewer arrests but they still occur.
Then come in the corporates and get greedy, they want all the money, your country will want taxes out the gazoo, they will try to push the little guys out of business. The more laws come through, the more it screws the little guy in this.
Going legal is a bit of a Catch 22.