It doesn’t matter how good is internet connection nowadays, the source in the server is still encoded losing some quality.
Tried to watch Batman Begins in HBO Max, despite being offered as 4K UHD, the loss of information was noticeable on my OLED tv, specially the blacks (as you know, there is almost no black colour in Batman /s).
A friend of mine lend me his Nolan’s Batman trilogy on BR 4K UHD and it was like night and day.
Since the lbs I’m buying physical for movies that I like the most and want to watch them in the highest quality possible.
Well, I usually focus on the side quests 😓