IBM's quantum roadmap[0] also looks... curious. There's some modest scaling until 2028. Then there sudden orders-of-magnitude jumps in the following years. Perhaps that's backed by technology they have in the labs and plan to have ready by then, but without details it looks too good to be true.

[0] https://newsroom.ibm.com/2023-12-04-IBM-Debuts-Next-Generati...