The vintage Mac scene came up with
RetroChallenge a few years ago (like, 2002 or 2003.) I personally hosted and curated it at least once.
In its original incarnation, the challenge was to use something "ten years old" but that was quickly abandoned once Power Macintosh 6100s, 7100s, and 8100s were less than ten years old. Mind, this was back in the day when most of us were actually still using Mac OS 9 and IE4/5 as our main browsing systems, so even doing RetroChallenge on a good '040 with a big disk and a lot of RAM (like more than 24 or so megs) was really pretty boring.
These days, RetroChallenge has switched over to a new format, focusing on doing interesting things with old technology, rather than the "endurance" challenge.
And, it's probably for the best, because endurance challenges aren't really that interesting at this point, if you're Paul Miller it can essentially totally destroy you, and to be perfectly honest, computing hasn't changed quite enough since the days of a machine like a fast G4 or just about any G5 that those systems would really be challenging to use.
Heck, my Windows 10 Tech Preview system has been a ThinkPad R61, which might actually be one of the few Core2Duo systems from 2007-2009 that i own that is actually slower than most G5s -- it's got a 1.8GHz single-core Celeron (Merom) with 4 gigs of RAM and a (new) 500GB/5400RPM hard disk, and for the most part, I'd describe it as "fine" -- it tests my patience and I'm not about to process my photos on it (compared with the 2.5GHz Core2Duo I use for that task) but that may even change as Windows 10 stabilizes a bit.
So, the idea of an endurance challenge on a late PPC Mac(1) is honestly pretty boring. It was somewhat poorly conceived idea when we first started doing it with 68k Macs, because at the time, a large majority of the site was already using 68k Macs in a primary or extremely heavy secondary role, and because it happened over the summer when less work happened, it meant that everybody was essentially given a free pass to have an excuse to turn off their modern computers and play Oregon Trail(2).
(1)Especially given that a fair number of people in this subforum choose them as their only or main computers (or most frequently used computers) specifically because they don't change or because they favor a particular version of a tool.
(2)Not that this is a bad thing, but the community where RetroChallenge started, the 68kMLA, has a lot of really young people onboard, along with a few educators. There are others, but for them, exceptions were made for work systems and work-critical communications devices, etc. What it essentially meant at the time, especially because there was almost nothing that had really grown beyond needing a good Quadra to render well, was that we were all just showing off, and the person who had a Q840av and a good display for it was the winner because their system was going to make them wait the least, and as such, be less tempted to turn on a PowerPC Mac.
Now, if the endurance challenge is to go use a 68k Mac for a while, then that would be a little different, if only because using a 68k Mac (or even Mac OS 9, exclusively, without the help of Classic Mode) requires some creative problem solving and the use of different tools as bridge machines. For example, folks over at the
68kMLA (and the Apple IIgs scene) have been getting good at setting up and using netatalk in Linux virtual machines as a fileserver.