1 Gbit/s is pretty close to still being overkill. 25 Gbit/s is laughable overkill and appears very likely to remain that way for the coming decade.
Consumers around the globe have had increasingly common access to 1 Gbit/s for a decade and there still aren't any other great, common use cases for it beyond very high quality video streaming.
It didn't take very long for computer use to need more than 640K by comparison. In the computer realm those edges were being constantly pushed at that time. Such is not the case with bleeding edge consumer broadband speeds today.
1 Gbps is laughably slow. It doesn't even keep up with hard disks. Network attached storage is crippled by 1 Gbps networking. It's ancient. I remember doing an assignment in 2005 to design a network on a budget, deciding to "splurge" on gigabit, and finding it very much affordable. That was 17 years ago, and yet consumer networking barely budged since then.
10 Gbps is still below the 7 GB/s that a single NVMe on PCIe 4 (which is readily available) can achieve.
25 Gbps is still below that.
I'd say 100 Gbps is where the current practical maximum is more or less. You'd have a hard time writing or uploading data that fast on anything resembling consumer hardware.
1 Gbps is slow. Even recent wifi can plausibly exceed 1 gpbs to a client. Pretty much any modern HDD (let alone ssd) can read or write faster. USB 3.1 is an order of magnitude faster and display port 2.0 tops out at about an order of magnitude faster than that. It doesn't really make sense to leave the main physical network interface so far in the dust, let alone claim it's overkill.
