I thought this would be a fun topic. I know this is a controversial opinion but I'm going give some pretty good facts (I swear).
1. Everyone can play low AR but the same cannot be said for high AR
People like to claim they cannot play lower ARs because it's "too slow" or something but I'm going to argue that everyone can play low ARs. The simplest way to play something low AR is to simply drop the difficulty rating down low enough so that the object density is not an issue. At first, you may re-actively try to hit the circles too early, however, given a very short adjustment period, this is not a problem at all.
You may not be great at the low ARs but you are only truly good at the ARs you play most frequently. Even if you play AR4 and AR10 frequently, that won't automatically mean you can play AR6 just as well. You may be able to play AR6 better than someone who plays only AR9 and AR10 but it won't be at the same level as your AR4 and AR10 abilities. There are just levels to it.
Finally, higher ARs require you to be able to react fast enough to play it. It doesn't matter how low you make the difficulty as if you can't react fast enough, you simply won't be able to play it.
2. The perceived difficulty in low AR is completely baked into the high object density
When people think low AR, they think high object density. However, object density isn't a feature of low AR. You can get high object density high AR maps too. The only problem with trying to make a map high AR compete for object density with a low AR map is that the difficulty would be way too firetrucking high. So basically, low AR players are just good at reading high object density - AR doesn't really mean anything. This brings me to number 3..
3. High AR doesn't need high object density
High AR doesn't need the high object density of low AR to compete in reading difficulty. This is because low AR gives you more time to process information. You have roughly 3 times more time to process the information on your screen on AR4 (EZ) vs AR10. What this basically means is you have a higher tolerance for high object densities as you lower the AR.
The only way low AR is more difficult vs high AR is in reading the rhythm. Visually, it doesn't compete.
Change my mind.
1. Everyone can play low AR but the same cannot be said for high AR
People like to claim they cannot play lower ARs because it's "too slow" or something but I'm going to argue that everyone can play low ARs. The simplest way to play something low AR is to simply drop the difficulty rating down low enough so that the object density is not an issue. At first, you may re-actively try to hit the circles too early, however, given a very short adjustment period, this is not a problem at all.
You may not be great at the low ARs but you are only truly good at the ARs you play most frequently. Even if you play AR4 and AR10 frequently, that won't automatically mean you can play AR6 just as well. You may be able to play AR6 better than someone who plays only AR9 and AR10 but it won't be at the same level as your AR4 and AR10 abilities. There are just levels to it.
Finally, higher ARs require you to be able to react fast enough to play it. It doesn't matter how low you make the difficulty as if you can't react fast enough, you simply won't be able to play it.
2. The perceived difficulty in low AR is completely baked into the high object density
When people think low AR, they think high object density. However, object density isn't a feature of low AR. You can get high object density high AR maps too. The only problem with trying to make a map high AR compete for object density with a low AR map is that the difficulty would be way too firetrucking high. So basically, low AR players are just good at reading high object density - AR doesn't really mean anything. This brings me to number 3..
3. High AR doesn't need high object density
High AR doesn't need the high object density of low AR to compete in reading difficulty. This is because low AR gives you more time to process information. You have roughly 3 times more time to process the information on your screen on AR4 (EZ) vs AR10. What this basically means is you have a higher tolerance for high object densities as you lower the AR.
The only way low AR is more difficult vs high AR is in reading the rhythm. Visually, it doesn't compete.
Change my mind.