Switches are still quiet expensive, but 10G cards are quiet affordable nowadays. Notebooks can use a Thunderbolt 3 to 10G ethernet, but I think we will see 10G ports one consumer notebooks soon.
I wouldn't invest in a bridge technology like 2.5G since it introduces non-trivial costs an offers only 2.5x speed up instead of 10x.
Consumer notebooks are moving away from having ethernet ports in general.
10GBASE-T is relatively power hungry, requiring a couple of watts per port. I don't think we'll be seeing this in consumer notebooks any time soon.
Also, I have one of those Thuderbolt to 10G adapters. It's not small. It's only useful when I'm doing bulk file transfers.
2.5G is fine for most work. Many consumer NAS boxes can barely saturate 2.5G anyway.
I might be wrong, but I don't think that every notebook will be as slim as the height of a USB-C port and with only one or two USB-C ports as only ports. This might be true for Apple and some companies that copy Apple. But there are still consumers notebooks that don't follow that trend and build some bulkier books with more ports and better thermals.
> 10GBASE-T is relatively power hungry, requiring a couple of watts per port. I don't think we'll be seeing this in consumer notebooks any time soon.
It all depends on customers needs. I would rather have a 10GBASE-T port than a dedicated GPU in my book, and I think the latter even consumes more watts.