>>989458Don't listen to those retards. Your drivetrain is fine, it has plenty of life in it. What you see on the cassette are shifting aids, specian ebossments and ramps on the cogs to aid chain changing cogs.
Take a look at pic related. Sram force, even more aggresively cut to make shifting as fast as possible.
Your drivetrain is fine, it just needs cleaing/lubing.