So, for higher bandwidth plans people started using raspberry pi4bs with an additional usb3 Ethernet dongle. Its WiFi is not really up for the task but it does seem to make a mean wired only router, the quad A76 cores seem to be capable to reliably shape up to 1 gigabit with cpu cycles to spare.
So maybe get one of those and change your old wifi router into a wifi AP?

Disclaimer, I have not tried that myself, as I am on a 100/40 plan and already have a router well capable of that speed.

Best Regards
        Sebastian

On March 25, 2020 6:29:17 AM GMT+01:00, Matt Taggart <matt@lackof.org> wrote:
>On 3/24/20 10:01 PM, Aaron Wood wrote:
>[snip]
>> At the moment, however, my WRT1900AC isn't up to the task of dealing 
>> with these sorts of downstream rates.
>> 
>> So I'm looking at the apu2, which from this post:
>>
>https://forum.openwrt.org/t/comparative-throughput-testing-including-nat-sqm-wireguard-and-openvpn/44724
>
>I recently got CenturyLink gig fiber and bought one of these:
>
>Qotom Q355G4
>https://www.amazon.com/gp/product/B077ZWR8Q9
>
>And it's running OpenWRT 19.07 just fine, boots from a small USB
>thumbdrive.
>It has no problem with CAKE + piece_of_cake up to 1gbit
>
>Here is a table I made comparing the Qotom models
>
>https://we.riseup.net/lackof/x86-router-candidates#qotom
>
>(compiled last December, so prices may have changed)
>
>-- 
>Matt Taggart
>matt@lackof.org
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