I think it's more about the message than the alarm itself. The problem I saw with alarms is not that I never hear them, but most of the times I do hear them but just turn it off because that's the only thing you can do with an alarm, right?

But if I can hear a message containing meaningful content, I will listen to it, because that's the intended action. And if that content tells me my todo list for today and helps me realize how busy I am and gives me the sense of urgency, it would be easier to wake up. Because as I mentioned, there are countless times where I regret not waking up and think "Damn if I was able to think rationally while I was sleeping, I would have totally waken up."