I just wish they sold the transceivers separately from the fiber. Being able to use any random length of cheap off-the-shelf SMF/MMF fiber would be so much more convenient than having to get a custom one-off cable.

They exist for medium-speed HDMI (see for example [0]), but I haven't seen them for modern high-speed DP yet.

https://www.amazon.com/Converter-Extender-Transceiver-module...