A keyboard's durability depends on the quality of materials used along with user behavior. However, a wireless keyboard is expected to last for up to 10 years, though the user should handle it carefully to guarantee long-term usage.

A major drawback of wireless keyboards is input lag. Input lag is a situation whereby there is a delay between the time you type something and the monitor's reaction to what was inputted. This could greatly affect your experience with fast-paced games, especially FPS titles.

Of course. If you have a low battery while working or gaming and don't want to pause the activity then you can keep the keyboard plugged in. Although it can be used in multiple positions, it's also fine to keep it plugged in while being used.