But when has that EVER worked in the industry's history that a console manufactor would go on to have more success or inspire any change after becoming 3rd party?

Didn't work for Sega.

Didn't work for SNK (Neo Geo,  again for you young folk).

Didn't work for 3DO.

Didn't work for Hudson Soft/NEC (Turbo Graphix 16/PC Engine for you young folk)

Didn't work for Atari.

Even with Nintendo's IPs being as popular as they are, Nintendo going third party would require them to learn new hardware, work under smaller budgets and things that other developers go through but without one of their primary revenue sources which is there norally always profitable hardware and knowledge in most cases on how to get the most of it. I get it is a dream for those that don't want to or can't buy more then one console device to see Nintendo going third party but aside from hope that they will be able to adapt to new hardware they didn't make (which the Wii U's slow development of HD software on a device of their own design proves is likely not to happen) there is nothing that says that Nintendo could survive or succeed if it ever went full third party.

Sounds like you don't exactly disagree with me. My point is Nintendo will be Nintendo whether or not they make home consoles.

A little off topic but to respond to a sentence in the OP, the early to mid 90s was definitely not entirely where the Golden Age of gaming was limited to, or rather as the OP puts it widely remembered. Many more than that widely remember it still going on into the 32-bit/64-bit generation and even a little bit into the PS2/GC era.

The general consensus make or break a year is 1991-2002. The Golden Age wasn't limited to the 16-bit generation, as much as we all know the ones who prefer that generation like to keep telling themselves that >_>.

To segue more on to the topic at hand, you could say that it was because Japan (a country that has far less homogenized games than others) was the country at the forefront of the gaming industry during that time that made everything feel fun and exciting. That is reason alone to have Nintendo stay in gaming.

So we as gamers definitely want to keep Nintendo around.

No, they aren't really.

The primary reason for Sega being able to buy other studios and companies in recent years, has nothing to do with them being more successful, but it has to do with them being bought out and merged with a much more healthy pachinko company in Japan called Sammy in 2003. Between the pachinko money and a few well received new francises aimed at the Japanese market (Yakuza and Hatsune Miku) they haven't had strong recent success worldwide aside from Sonic games.  They have made some good to great games yes, but they haven't been able to keep a franchise going themselves outside of Sonic, the previously mentioned two aimed primarily at the Japanese market and the Shining games (which have become anime cliche central and a playground for anime/manga artists to pimp out fantasy designs) since they exited the market as a 1st party publisher.

The Sega today is not the one of its glory days.

OK. Examples?

People arent in support of no nintendo. Theyre in support of no nintendo home console

This. Nintendo is all 'bout games, so they should do just that, gaems.

Every single 3rd party game that came out on the 360, PS3, XOne, PS4, PC, but not the Wii U. I never said that these companies would stand for Nintendo's BS, if Nintendo thinks they're expandable, it's just fair that they would do the same.