I don't see all these things as being comparable to AI... At the bottom, they were "100%" technologies. Trains were just able to transport commodities, and the internet was able to reliably connect computers. So their path to success was about gaining market.
Since they were 100% technologies, they disappeared. One could build solutions using them and forget they are building blocks, because they just worked.
LLM AI is different at the fundamental level, because it's non-deterministic. It needs human-in-the-loop. It won't ever disappear. Gaining market share doesn't fix anything.
If SMEs were able to buy and host their own GPUs, they would not hesitate to avoid paying a subscription for access to AI tools. They're already starting to do this.
Models already are a commodity, the massive bump in access prices to profitable levels is not going to happen, because businesses will not pay it.