September was part of the metaphor because it was a time when decent internet access was mostly via universities and September was when the new batch of freshmen "came online" and started stumbling around the places these folks were regulars at but eventually assimilated or left before the end of the school year. (I expect the same thing happens at the bar scene in college towns but I've never heard it described that way.) Eternal September is the forever version of everyone having access and overwhelming those spaces without it ever being able to recover.

Is there something I'm missing about March or is it just a diverging reference? If the wave of non technical folks being able to automate new things is here, what's the equivalent impact of that? Maybe this is the inflection point where everyone needs more tech support like some sort of post Christmas surge? Maybe less because they have the tools to help themselves without trying now?

I'm not sure we're there yet anyway; I think this is still first adopters and enthusiasts. I asked my wife and some non technical friends and none of them have heard of openclaw yet. I think the deluge will happen if Apple or Android bakes it in or one of the big ai companies makes the app good enough for a normal person to unleash it upon their life and community.

It was more that regular people started joining the internet through just paying for ISPs. Before that, most of the people just joining the internet were students, so there would be a wave of newbies at the start of the university year every September and they would get acclimatised to the culture there during the year. But once it was year-round and many more people it swamped things and the culture shifted or closed itself off.

Eternal March already happened in 2020.

We also have No Silver Bullet from Mythical Man-Month

https://en.wikipedia.org/wiki/No_Silver_Bullet