I have contemplated getting a partner many times, but all the negatives I have mentioned in this thread (and others) keep me from pursuing one. The major advantage to partnership is that your partner is just as concerned about the business as you are. S/he will work to make the business a success and is willing to accept less money if business is lean. Having a partner means you can go on vacation or be sick while the business continues running. And if your partner likes doing the aspects of the business (like paperwork) that you don't, you will be much happier. A partnership, however, is like a marriage. There is be disagreements, sometimes fights, and all the inherent stress. If you decide to dissolve the partnership, and you don't have a well-written partnership agreement, it will feel like a divorce.
On the other side of the argument, since I am a union contractor, I have access to a hiring hall full of trained electricians that I can hire and have working almost instantly. I can also lay them off instantly without repercussion. So I never have to do a job alone. One quick call gets me a helper, apprentice, journeyman, or foreman, for the next day (assuming there is a worker available who values working over unemployment pay). Non-union contractors may have access to similar hiring halls or temp agencies.
Employees are much easier to have. You can hire and fire them at will. You tell them what to do and they should go do it. (This works well for supervised employees on gangbox jobs, not nearly as well when you need service truck electricians who work independently.) You also don't have to share your profits with them. This is why owners get rich and employees get by. But employees don't really care about your business. They just want their steady paycheck and will quit if you can't provide it or they just might quit without notice for no reason at all right when you need them the most, something a partner generally won't do.