That's demonstrably untrue, especially for Nintendo.
GBA SP, DS Lite, DSi, New 3DS, Wii MotionPlus, etc. Nintendo loves them some hardware revisions.
I wouldn't consider the first versions of those systems half baked. The original GBA was designed as a very cheap, decently powerful system that had a monopoly over the handheld market, the original DS was kind of trash but that's because it was something that the company didn't really have faith in but its concept and hardware was sufficient for the games that eventually landed on it, the DSi and New 3DS had increased power but it was hardly ever utilized because of concerns over fragmentation, the new 3DS had improved 3D but no one really cared about 3D in the first place, and Wii MotionPlus was an add for a system that was already extremely successful because its hardware was already capable of providing an experience that engaged people.
I think bytesized was referring moreso to things like the N64's cartridges, the Gamecube's minidiscs, the Wii U's horrible CPU and hardware that was unable to ever be reduced in cost because of how proprietary/oddly designed it was. These were problems that would have persisted because they were all integral to the hardware, attempts to fix these things like the 64DD failed, whereas the Wii U was lowered into the grave prematurely precisely because of how bad of a piece of tech it was. The Switch is hardware that is a lot more forward thinking. Cartridges aren't as expensive anymore and its hardware is scaleable to a variety of form factors and is much more receptive of price drops. Joy-cons are able to be used as a normal controller or as motion controllers that would work well with VR should Nintendo ever decide to pursue it. It's a very solidly designed piece of hardware where revisions would only improve things rather than try to fix fatal flaws in a way that fragments a userbase.