I admit, no. However, I have seen video recorded in high frame rates, such as 60 fps, versus 24/30 fps, and admit there's a difference. Some people think it's better, some not -- as in whether it's an improved experience not whether there's a difference.
In that experience, it is much more comfortable to scroll or move an input device with a high refresh rate monitor.
I'm using a
390 Series 27" Curved Samsung and a significantly old Mac... And I'm not seeing any notable stutter, tearing, or other lag related effect when fast scrolling or zooming in and out. COULD a higher refresh rate make it seem more "buttery" smooth? Perhaps, though negligible.
In other words, no direct experience.
Maybe not, perhaps just factual explanation.
Oh I don't need an explainer, thanks. I am very familiar.
There is a tradeoff on LED screens -> the colors on my MBP are definitely more accurate than either of my 144hz monitors (one supposedly wide gamut "DCI-P3" IPS and one supposedly "sRGB" TN). I suspect one of the reasons many people complain about stuttering and laggy MBP screens (search the forums) is because of the panel requirements for accurate color. For a phone, you are constantly moving the objects on the screen, so I'd take a little color loss if required.
I'm not doubting you might interpret some difference. Nonetheless, I wasn't stating there's no visual difference when doubling the refresh rate. I said the difference is evident in limited situations -- which you appear to at least partially support
Finally, I'm not convinced macOS fully supports high refresh rate in all Applications, particularly Catalyst (News is obviously not supporting it). So, similarly, not all apps support it in iOS, but they should, and I'm sure having a phone run 120hz would eventually lead to full support everywhere.
...And probably not worth the cost to the majority because of this limited impact.
Ultimately, you're allowed to make comments and decisions based upon your perspective. So, if you believe the iPhone wouldn't be advancing without a 120Hz or higher rate display and thus don't want to purchase the next generation if it doesn't include such, that's okay.
I was sharing the facts as I see relevant -- pun not intended.
UPDATE EDIT:
The significance of cost difference is in part assumption/opinion by me. Although, compare otherwise similar featured products with those sporting higher refresh rates.
There are valid reasons why 60Hz+ hasn't gone mainstream (yet).