I was in a similar boat. My Galaxy S9+ was in its 5th year when I learned about the security update stoppage. I went for a midrange Pixel 6a that approximates the flagship of 2018. I'm not sure if this is due to getting used to the Samsung UX style after 9 years, but I find some choices Google made to be less intuitive or smooth, though I've gotten used to it. The only thing I maaay look for in my next phone which I don't currently have is a 120hz refresh rate - but I might not want the extra power draw. So I'm satisfied. The extra battery life is a huge QoL improvement.