Going for higher bandwidth tends to increase signal interference. There are various ways to deal with that, most of which cost money. For example, most high speed data cables use twisted pairs that help cancel out interference. To go faster, the twists need to be tighter, and that’s more expensive to make.
If there is no customer demand for those use cases, then there’s no reason to force a more expensive cable, connector, or signalling electronics just so you can meet specs.
Going for higher bandwidth tends to increase signal interference. There are various ways to deal with that, most of which cost money. For example, most high speed data cables use twisted pairs that help cancel out interference. To go faster, the twists need to be tighter, and that’s more expensive to make.
If there is no customer demand for those use cases, then there’s no reason to force a more expensive cable, connector, or signalling electronics just so you can meet specs.