could I opt to keep season 5 border
so i dont get lumped in with all the boosted players in season 6?
so i dont get lumped in with all the boosted players in season 6?
Short answer, no. Sadly.
However, you can go through a support ticket and riot can manually remove your boarder so you have none. Which could be an option to weigh the pros and cons of.
Tbh if the plat border looks worse than the gold border I might ask riot to drop my border to gold anyways.