The limit was mainly due to lack of hdmi support. There are obviously some crts with hdmi but they’re fairly uncommon as display manufacturers basically abandoned crts quickly in favor of significantly lighter yet larger display tech that was much more popular with average consumers. Obviously crts can do much higher resolution over dvi or even vga. with home av stuff they abandoned those connectors as well as component early on in favor of hdmi.

One of the other niceties associated with crts as a result. A monitor that you could just plug in to a source and it would work, from a time when manufacturers didn’t have the ability to kneecap your setup with handshake bullshit. Now hooking up stuff is just a bit more likely to be frustrating and nonstandard setups are much more likely to simply not work without pricey extra hardware. Want to split your bluray player or playstation 5 between a an oled television and a projector? It may just work with a basic hdmi splitter, or it may not. It may only work with certain hdmi splitters. It may only work if one display is on at a time. With dvi you could’ve gotten a basic splitter and it would’ve worked guaranteed regardless, but hdcp means that hdmi splitting will give you headaches because god forbid you hook up a secondary source to record a copy of content you purchased. Despite that, it’s still easily defeated with relatively cheap hardware, making it completely and utterly pointless as well