The last time I felt that my laptop had a shortcoming - a real, noticeable-daily, vexing insufficiency - it was the battery life.
Three, four, or five hours just aren’t enough to fulfil the promise of a computer that isn’t plugged in. Likewise, a portable machine becomes a lot less portable when you’re carrying a power brick too. A laptop with only half-day battery life is essentially a lie.
That was a few years ago. My battery problem has been solved.