Even getting a 20-year-old console (which in the retro gaming world isn't that old) to work with a modern HDMI TV is a headache!
Despite owning the hardware and plenty of games, I had to drop a couple hundred bucks on a RetroTINK scaler to make my PS2 playable again. Which is no hate to the RetroTINK, because it's an amazing little gadget (and its output looks great), just kind of sad that it takes so much money and effort to keep playing a console I've owned since I was a kid.