Premiere's timeline and interface in general is just a lot slower than other NLEs and other apps like Blender. I use Premiere almost every single day so you don't really notice it until you open another NLE on your machine and see how bad its fallen behind on interface smoothness.
Here is a 60FPS capture of me scrolling through similar timelines in Premiere and Resolve. I cropped out the top just to focus on the timeline smoothness/sluggishness.
Premiere takes 4frames to update the scroll and often flickers waveforms and other icons as it struggles to keep up with a smooth framerate.
Resolve's timeline renders at 60FPS. Every frame there is an update being sent to the screen. This is typical of any modern app when it it's unterface is properly omptimized to run on the GPU.
It's not just the timeline its scrolling through a bin, its resizing windows etc. It all renders at about a 1/4 of as fast as it should in 2023.
This stuff matters. Premiere causes eye strain because its basically it runs basically like a seizure inducing slide show. I am more tired after using Premiere than after using something that runs at a smooth consistent frame rate. Its distracting and takes you out of what you are trying to do. You make more mistakes when things aren't udating quickly enough. It generally slows you down. Things should not lag 8 frames behind your mouse with modern 4ghz multi-core setups and dedicated graphics!
Adobe please find a way to make Premiere run as smoothly as your compretitors. Premiere needs some version of "project butter" across all its apps like Android did back in 2012. It's time.
I have been and will probably remain a loyal customer, but the Premire lifers would love some quality of life updates and not just a superficial coat of paint on the interface.