What is QuickSwap old?

Excuse me, could you elaborate on what "QuickSwap old" refers to? Is it referring to a previous version or iteration of the QuickSwap decentralized exchange platform? Or perhaps it's a nickname or shorthand for a particular feature or functionality that existed in the past? It would be helpful if you could provide some context or clarification as to what specifically "QuickSwap old" represents. Additionally, what makes it notable or worthy of discussion, and how does it compare to the current iteration of QuickSwap?