Mind you, I don't really have any alternative suggestions.
This is thing.
If this choice is between:
1. A gameable system that will be gamed by most students.
2. An ungameable system that will unfairly punish those bad under pressure and time constraints.
There isn't really a choice at all.
One option would be a school-provided proctoring system, allowing teachers to outsource the actual test-taking times. It could be done outside of class time, at the student's convenience, and they could have 3-4 hours if they chose.
Given modern communication technology it’s still gameable
And rates of cheating of "well under 1%" vs "well over 50%".
Even if we allow for less rigorous proctoring standards, we're still probably talking about "2-3%" vs "well over 50%".
But we could do what I'll call a "monastic exam".
You've got a week, not an hour, but it's in a little monastery and you don't have your phone or other unapproved tools.
I will say it's not practical to have exams that long. In this case, the dorm required me to move out immediately after the exam and my parents were waiting to pick me up, so I decided to leave after 4 hours to avoid unnecessary panic or having to drive overnight. In hindsight, the professor probably would have let me make a phone call, but that didn't occur to me at the time.
Let's get real here. I know why these nonsensical memes keep propagating but dear god. People will just believe anything these days, including that gas stoves cause asthma or whatever other bullshit is being peddled.
But I'm not particularly brilliant, in fact I wouldn't be terribly surprised if I have undiagnosed ADHD. My test taking performance trick, which I freely told everybody to their annoyance, was very simple. I knew the material! Read the assigned texts, do the optional homework, pay attention in class. If you know the material you don't have to try to cram it into your brain in the last half hour before the test. If you know the material you don't have to try to reason it out from first principles during the test. You just go in, fill out the easy answers straight away, go back and do a second pass for the tricky questions, and that's it. If you have to sit there wracking your brain for 30 minutes on a single problem it's because you already fucked up with how you approached the course weeks ago.
Again, I'm not special for this. There were a handful of other students who were as fast as me. We'd sit in the hall waiting for our friends, look at each other and say "you knew all this stuff too, huh?" "yeah of course"
Bullshitting though tests is a learnable / trainable skill, but schools generally do not teach it very coherently or well and most students do not deliberately practice it. It generally doesn't have that much to do with the content or other skills intentionally taught by any particular course or by schools in general (there's decent overlap with the skills involved in competitive debate and extemporaneous speech, which some students participate in as an extracurricular activity). Rating students on how good they are at bullshitting their way through exams is sadly a significant part of the way our education system is focused and organized, but in my opinion it is not a valuable or particularly valid approach. There are certain professional contexts/tasks where this kind of skill is useful, but developing it per se shouldn't be the focus of the education system.
Sometimes this and related skills are summarized as "intelligence" ("oh she aced the test without studying, she must just be really smart", etc.), but in my opinion it's quite a misleading use of the word.
Learning to perform under pressure is the main purpose of attending college.