Please let me reiterate. I think it's an incredibly flawed logic to think that Nintendo is going to stop milking every dime they can out of fans like you for as little expense as possible. You are Nintendo's bread and butter.

There are millions of Nintendo fans just like you. Do people honestly think Nitnendo is going to completely abandon a demographic that buys 2-3-4 iterations of their hardware, and dozens of games to try and and get some positive PR and capture a couple million more casual fans that might buy 3-4  games, and have no interest in buying multiple pieces of hardware? They make far more money selling someone like you two incompatible pieces of hardware, and making you buy the same games multiple times to play it on both (because lets be honest here, you or someone you know probably will).

I really don't think they're going to abandon it so easily when they know they can easily make a derivative handheld based on Switch hardware that is incredibly easy to port games to that will have you (or someone like you) going out and buying that hardware pretty much day one and buy half of your Switch library all over again just so you can get the "deluxe" version of say, Breath of the Wild, or Splatoon 2, or Mario Odyssey that cost them just a fraction of the original titles to make.

Ohh no, they're not being stupid. They're trying to make as much money as possible. When you look at from a perspective of "trying to extract as much money from their fans as possible" a lot of their decisions that make people scratch their heads become very easy to understand.

Why is their online service rumoured to be much cheaper than the competition's then?

Do you think Sony has two seperate divisions for the PS4 and PS4 Pro? Do you think that they would need to if the PS4 Pro accepted their own unique "high capacity" 4K Blu-ray discs that were incompatible with regular PS4s that they would need to create all of the seperate channels above you listed?

Who said anything about having two sepeate divisions for all of that stuff? What I'm talking about is a handheld that would be slightly more difficult  to support as the PS4 Pro is, except it takes a different shaped cartridge because money.

Nintendo needs to show a positive move in the market. Any decrease in numbers will not be viewed upon as a good thing.

Fact is that is iOS is one platform, same is for Android. And yes, majority of apps works on most of iPads and iPhones.

Of Course I think Nintendo will make different iterations of Switch hardware, just look what all they done with 3DS family, but Switch like hybrid console gave Nintendo much more opportunities for other iterations we could have Switch Mini/Pocket, Switch just for home console play, Switch Pro, Switch 2, Switch VR/AR addon...

And like I wrote, fact they admit they can't any more support effectively two different platforms, fact they merge their handheld and home console hardware division, and handheld and home console software divisions...tells us what exactly they are doing with Switch. So yes I am certain that Switch will is unified platform and we will not have separate platform alongside Switch, we will have cheaper and smaller Switch Mini/Pocket just for handheld play in around 1.5-2 years when 3DS completely dies, and only time will show if I am wrong.

Because?

The actual fact is that iOS is not one platform in the same way that a video game console is one platform. The term "platform" in the technology space has many different meanings, and you're assuming it means the same thing every single time it is mentioned. It's like calling "PC" a platform (it is) when we all know that Forza Horizon 3 isn't going to run on your "PC" if it only runs OS X or Linux or Windows 3.1 for example. Sure, it is far easier to port a PC game from Windows to OS X than it is to say, port a PS3 game to OS X, but that does not mean that Windows and OS X are actually the same platform from a game development perspective even if they're running almost on identical hardware.

The fact of the matter, is that there wasn't actually much stopping Nintendo from making a "Wii U portable" or a "Wii U Pro" or a "Wii U 2" or a "Wii U VR add on".... but they never, and there really isn't much reason to expect Nintendo will change their hardware deployment philosophy this time around either.

All we have here is a handful of fans who want so very dearly for Nintendo to just make one device that they have a huge confirmation bias that prevents them from interpreting what Nintendo says in any other way than the way they want it to mean.

They most certainly will abandon it if the financials make sense for them.   What do you think the costs are of running 2 seperate hardware and software divisions are? 2 seperate shipping channels, 2 seperate marketing campaigns, 2 seperate developer support systems, 2 seperate R&D divisions....and on and on and on.

Again, context, frame of reference and circumstances of the variables.

Oh, and who the hell is going to buy a "portable" Switch and rebuy half their Switch games for it?