My router is about the same age, and with a 200Mbs dl speed and ~20 devices attached (no more than 6-8 actually in active use at the same time) everything still

My router is about the same age, and with a 200Mbs dl speed and ~20 devices attached (no more than 6-8 actually in active use at the same time) everything still works fine all these years later. No one every complains when a few of us are streaming video and someone starts downloading > 20GB Steam game-- the router adjusts, streams continue, Steam uses whatever is left over, etc.