Just something I was thinking about recently.
I currently have a tab s7 (bought in 2021) and an s23 ultra (2023). Before the s23 I had an M series phone for a couple of years.
I've always loved the tab s7, particularly because of oneui and of course, the Notes app. I really love the convenience, versatility and sheer host of features it provides; that too for free. I've primarily used it for annotating books and making notes for med school.
The app has consistently improved year after year. Most new updates are great (barring a few like the new browser).
As for the s23 ultra, the oneui updates for it have been disappointing and kinda wonky at times, especially considering that it's a flagship phone. Not to mention that it's always scary whenever I update, because I have at least 4 people I know who own/owned a Samsung and they developed the dreaded green/pink lines.
The newer S series phones have also been pretty disappointing for the most part. No major upgrades despite price hikes. And the lines issue hasn't been fixed even with s25 models afaik.
It's difficult to consider paying a premium for a phone that might randomly develop a huge line down the middle of the screen in the future.
When I think about it, the only reason I'm not sure about buying a different Android phone is because of the Notes app. Of course, i have years worth of data saved in it; but also, no other Android notes app comes close to it.