Not to mention that for a lot of routers, DD-WRT (and the like) will install and boot and work but they won't support all of the features; I've heard quite a fe

Not to mention that for a lot of routers, DD-WRT (and the like) will install and boot and work but they won't support all of the features; I've heard quite a few cases where AC routers would only work in N mode, or where you could set options that the hardware didn't support (and thus wouldn't take effect), and so on. It's not their fault, necessarily; it's one team which has to maintain support for effectively hundreds of devices, and that's pretty complicated. Still, there isn't a lot of obvious warning that 'hey, a bunch of what makes your router great isn't going to work if you install this so that might not be what you want.' My E4200 was a great example. Got it because it was well-reviewed and supported DD-WRT and the like, but changed back to the stock firmware because DD-WRT was unstable and slow. After a week of frustrating performance issues and iffy connectivity, I refreshed with the stock firmware and everything was suddenly behaving the way it should. The same thing happened with my R6250; flashed, had problems, unfleshed. DD-WRT seems like a good way to extend the life and usefulness of existing routers, and not a way to make the latest technology work even better; in my experience, it tends to have the exact opposite effect.