Come to think of it, when is MacRumors going to pop up a board or two for vintage iOS devices, a la the PowerPC Macs section?
Hard to say if they ever would. Who’s still rocking an iPhone 3GS as a daily driver phone? (Before you laugh, I saw people daily driving 10+ year old PowerBooks [including Old World ROMs] back after the Intel transition. I think the appeal was that 1) it was hardware they already had and 2) it was offline so it was distraction free.)
There might still be mission critical software for some companies running on old PPC Macs. There probably isn’t mission critical software running on an old iPhone 3GS (really, it’s more older games that people are interested in when it comes to older iPhones).
All that is to say that, outside of collectors and people nostalgic for niche mobile apps/games of yesteryear (or people trying to document niche mobile device accessory hardware of yesteryear*), there’s probably not all that much interest in running older iPhones.
* Back in the 30-pin days, I had a radio dongle for my iPod touch that tuned in HD Radio. It would be cool to figure out how it communicated with the HD Radio app. I could see someone going over it in a YouTube video in the future similar to how someone might go over the first party iPod radio (or random MP3 player accessories, a la DankPods) these days. Maybe we’ll see MacRumors add such a board in 5 to 10 years time (though, of course, the original iPhone will be 20 years old in 3 years**).
** Sorry, this realization makes me feel as old as it probably makes you feel!