Hard to say what current phones will last, but I used my original Google Pixel XL for 6 years before getting a new phone and had no issues. I only had to get a new phone because my banking app and other apps weren't supporting Android 10 anymore, and that's the latest you could get for that phone.

If you keep the phone from getting hot and don't charge the battery above 80-85%, it will last a very long time.