I think the main point is all the other (technical) brags are quite quaintly outdated (T1 lines are glacial by todays standard, while interestingly the lines about how quickly hardware becomes obsolete have become less accurate over time), on the other hand 100GB of RAM is still quite extreme.
This was an active topic of debate back in the days when people still relied on modems. T1 gives you 1.544 mpbs "bandwidth" but the fact that it's "guaranteed" bandwidth means it should be fast enough for anything you'd need to do as an individual user. If you had your own private T1 line all to yourself, the latency should feel the same as being on the same local LAN as whatever service you're trying to access. Even a 56k modem still had a small but noticeable latency, especially if you're doing command-line where you expect echo-back on each character you type.
People don't really understand the speed vs. bandwidth debate, but they do know the psychological difference when latency is low enough to be unnoticeable.
IIRC the point about T1 lines are their availability + uptime + bandwidth guarantees, but yea they're not so hot anymore from the ubiquity of other high performance networking alternatives.
I'd say it differently: 64Gb ram is easily purchasable and 128 isn't much harder - just $$$.
But to my knowledge not many purchase it. As the article says, the defaults for new items on the main vendors are still 8 or 16. I suspect most could be happy with 32GB for the next 3 years but that isn't a default.
