Your network is the key. I have had gigabit networks for over 6 years and 4 of them were fiber. Fiber is the ultimate because it’s fiber which is much less noisy which you can see and hear in streaming, lowest latencies, and ultra low jitter.
Also, not all Blu-ray players are the same. Anybody can pick up a used blu-ray for $10, but those units are pretty bad compared to day the Oppo or other quality players