There can still be issues. For example, how does the ELO system view previous wins/losses when calculating ELO gain/loss from future wins? Anecdote: My friends

There can still be issues. For example, how does the ELO system view previous wins/losses when calculating ELO gain/loss from future wins? Anecdote: My friends played the first few ranked seasons on my Xbox Overwatch account, they started at Bronze and eventually got to Silver. I decided to pick it up and play ranked with a different friend, we won 9/10 of the placement matches. I got ranked Silver, he got ranked Platinum. A month later, I make a new Overwatch account on PC and rank Platinum with ease. In these systems, if you gain a lot of skill in a short amount of time, or have bad luck early on in your ranked career, you can be held back in rank gains to the point that you are essentially stuck in place. Creating a new account generally allows you to advance significantly faster through the ranks.