A well known setting in iOS and iPadOS is the “Reduce Motion” feature in the accessibility menu. It stops the apps from zooming in and out when you switch between them. I understand some people experience a form of motion sickness when turned on, but the additional benefit of turning it off is that it seems to speed up the use of your device.
I recently found out that an additional option exists that prefers cross-fade transitions where possible. According to Apple “This setting reduces the motion of user interface controls that slide in and out when appearing and disappearing.” And this is indeed what seems to happen with the DTTG group browser.
I haven’t clocked it, but I estimate it speeds up the browsing of folders on DTTG by about 25-50%. Which adds up when you have to navigate multiple folders.
The options are explained at this page: