[Tuna-Fish]

For a lot of people, because they already have copper in the walls.

You are correct that 10GBASE-T really shouldn't be the default choice, fiber and DAC both have advantages over it. But compatibility is important, and there are a lot of situations where 10GBASE-T is just more convenient.

[protocolture]

>because they already have copper in the walls.

Makes a decent draw wire.

[asteroidburger]

If the cabling was installed before the drywall, good chance it's stapled.

[ssl-3]

Even if it isn't stapled: Good chance that it has turns inside of walls, floors, and/or ceilings that are impossible to successfully pull new wire through without creating new access for someone to get their hands in there.

Residential low-voltage cable plants are almost never implemented in a way that makes upgrades simple.

[protocolture]

Thats hideous.

[xxpor]

IIRC it's code :( Very silly IMO.

[protocolture]

I think the code probably allows for conduit.