First of all, I already acknowledged GC has some amazing technical leaps in posts from the past, I just made the mistake (in that particular post) of finding a Metroid 64 prototype that impressed me, and assumed the GC wasn't that big of a leap forward from there. But then, as I also mentioned in that thread, I discovered that was a fan-made prototype, and I withdrew my perspective that N64 to GC was a less than larger leap forward, which incidentally I had argued it had been prior to that thread. Can we please move on from that topic now?

Regarding iterations and new consoles, some of their iterations were focused on one country, or only released limited quantities, or weren't beefing up the hardware but instead making it smaller with less overall features, or a combination of these. I will be focusing on 4 significant final big iterations below:

So, considering OLED is very much like these iterations above, I predict that Switch 2 will launch 2 years (like the average above) after OLED Switch launches, so October 2023. But, if they release it quicker like they did the 3ds after the DSI XL, it could launch as early as February 2023.

But how can we know that the OLED model is the final big iteration?

Many thought that the DSi would be the final big iteration.

True, it may not be. Typical Nintendo life cycle's are about 6 years. Let's look at the gap between final iterations:

GBC -- > GBA SP (4.33 years)

GBA SP -- > DSI XL (6.67 years)

DSI XL -- > New 3ds XL (5 years)

Average gap between those final iterations was 5.33 years. OLED Switch launches October 2021.

New 3ds XL -- > OLED Switch (4.58 years)

So yeah, it is possible they will release one more console iteration after OLED, but it would have to be quick to be with their average of 5.33 years between final iterations. Still, I think this will be more like the GBC to GBA SP gap and be the final one before the Switch 2 comes out.

No, the OLED screen won't benefit me much since I barely play portable and the other improvements are not enough for me to spend that amount of money (the price it'll have in my country is still not known but it'll surely be more than $350), also my current Switch is only 1 year and a half old. Honestly, I usually don't get mid-gen revisions.

Regarding the Bonus question. I think one of 3 things:

1) The earliest iteration of the Switch OLED did used a new chip but because of the continued chip shortage and the high demand for the base Switch, Nintendo kept to the core Switch internals and sought to just increase their profit margins versus trying to increase hardware sales for a more radical evolution.

2) The Switch Pro still exists but will take a diifferent form, later in the Switches life. Maybe it'll be a standalone dock sold for $199.

3) The rumours were based on early iterations of Switch 2 which Nintendo is internally targeting for 2023 (based their annual report projecting 2020 to be the Switch's peak/FY ending 21)

Have only Switch lite, so I'm probably gonna upgrade to OLED model. Still was expecting a little more power and/or more pixels out of the new model.

I am still happy with my current Switch, but 'All I wanted was a Switch Pro' is exactly the category for me.

As to the bonus question I see one of two possibilities.
1. There actually is a Switch Pro in the works that will release in 2022. This OLED model will be the new base model moving forward and will drop to $300 when the new Switch Pro debuts with same upgrades, plus better internal specs, sometime next year.

2. Nintendo is hard at work on the Switch 2 and some early plans for it were mistaken for reports on the OLED model by 'insiders'.

no reason to get it since I play docked

Switch that I own right now is only 5 months old and I only played 4 games on it as I sold the old one I had since 2017, I might end up doing it again and then I will buy the OLED other than that I am happy with the one I own right now

Possibly.

I play 99% mobile right now curtesy of not owning a TV worth that name (my PC screen has 27" 1440p while my TV has 32" 720p and is more like a back-up for my wife so she can watch Netflix), so the improvements are something that I could use quite a bit.

The question however would be what to do with the old one. I might give it to my nephew, but since he's only playing mobile too, I originally wanted to buy him a lite model at a later point.

As such, it's a wait and see situation. If nothing new gets announced until the end of next year, then I'll buy the OLED version, else it depends of course on what gets announced, but probably that one then.