It's not an entirely serious position, but it's still a valid one. Where there's clear precedent and little reason to think there's something to change from this precedent (like a change of board members), then there's good chance the precedent will continue, no? Nintendo's corporate philosophy has been "lateral thinking with withered technology" - is there reason to think that has changed? Perhaps, noting their dwindling importance, they are trying something new.
In this discussion trying to guess what NS's hardware will be, precedent following N. corporate philosophy is very much a legitimate consideration.
I didn't say impossible. It's definitely possible. I said it's implausible.
Every console you have referenced is based on a device that was designed starting in 1999. NS isn't backwards compatible, it isn't an AMD device, it virtually has to have 500gflops+ when docked as it has active cooling, there is a laundry list of reasons that your position is wrong, it isn't implausible, the opposite is actually true. It is implausible that this device doesn't hit the minimum specs of Tegra Shield TV from 2015, with a better memory solution as that is where Nintendo spends its money on dedicated devices and given how cheap X1 must be now, that leaves plenty of room for embedded ram or faster solutions like LPDDR4 with decent bandwidth.
If you are going to hang your hat on Nintendo's hardware history, first you have to take in the facts (X1 was used in the devkit and NS is actively cooled) and then go down your history lesson to realize that memory bandwidth is rarely an issue with Nintendo, the last home console to have memory bandwidth issues from Nintendo was 20 years ago in the N64, and all the management has changed since then.