It also doesn't limit the selection specifically in the mission statement as the statement is a general statement as all mission statements are. That said, generality coupled with the added support of some devices while excluding others adds to the confusion.
I don't have a team of 20+ engineers to support all models. As I keep repeating, this is a one-man project, done on spare time. I have to chose those I can handle with the time I can commit to this project. I'm currently even starting to turn down support of some of the higher end models because there is simply way too many models for one man to support. Also the more models I have to support, the less likely I am to be able to support all models with every release, because each individual model requires Asus to prepare and send me a 1.2 Gb source code archive. That also means I am limited by the amount of time their engineer preparing these GPL archives can devote to my needs.
As for focusing on higher end models, how is RT-AX3000 not a higher end model?
Hardware-wise it sits below the RT-AX68U, RT-AX82U (two variants), RT-AX88U, RT-AX86U (all three variants), GT-AX11000 (two variants), GT-AXE11000, GT-AXE16000, GT-AX6000. And these are only the Broadcom models in their product stack.
RT-AX55U, RT-AX56U and RT-AX58U (and their bazillion variants) are all entry level AX routers.
The RT-AX58U was supported at the time because I wanted to support at least one more affordable model at the time where the cheapest AX router was $400 CAD, and I also wanted to support one device on that new SDK. It turned out to be a lot of work to support, and now that it has morphed into four or five separate models, I simply cannot devote any resource to supporting all of these variants. So I currently have no plans to support any of the newer revisions of the RT-AX56U/RT-AX58U.
That said, generality coupled with the added support of some devices while excluding others adds to the confusion.
I have no control over Asus' decisions to market new versions, causing that confusion. And I cannot magically extend my days beyond 24 hours, or quit my fulltime job to devote more time on this. It is what it is.
Just follow the list of supported models on the project website. I explicitly state which models are supported. I'm not going to start also mentioning the 60+ models that I don't support, especially as Asus is constantly releasing new models without me even knowing about their existence. That`s not how things work, and I have better things to do than trying to keep track of this.