Welcome to the club, @Juan6. I have a Samsung S7 from 4 yrs ago running Android 8. Don't worry because they make it up with keeping their app software up to date. I actually prefer the older generations since it would have saved me battery life.
For example, Samsung Internet has one of the best dark mode converters in the world, and I had that app since I first got the phone. I can't switch out since my eyes burn when I use Chrome.
Good Lock gives you more ways to customize your phone without doing sketchy rooting. Some apps are only exclusive for viewer devices, but I don't see myself using them anyways.
Smartthings has been around for a very long time to control your home. If I bought a smart bulb back in 2016, I can control it with the same app today.
Memo turned into Samsung Notes which is much better for cloud syncing to never lose your notes. It even has a modern UI like the newest phones and dark mode.