Why can’t other states do what Florida does?

Here we are mid-afternoon the day after an election, and we still don’t know who won dozens and dozens of federal races in Arizona, California, Nevada, Washington, New York, Oregon, and other states. In several states, the results won’t be known for days, perhaps even weeks. Yet Florida, the nation’s third-most populous state, has for several election cycles in a row counted and reported all its ballots quickly on election night itself, without controversy or major court challenges.