[MichaelGG]

I highly doubt that expanding the block size by a factor of 2 or 4 or even 8 will change it into something normal computers cannot handle.

The only reason things don't change is that miners don't change. The control lays with miners, full stop. IIRC, they agreed to some change by signalling a flag in mined blocks. The idea was that at a certain amount of consensus, the new behaviour would activate. Instead, the miners set the flag, then ignored it when the consensus threshold was passed.

I wouldn't be surprised if it was just an issue of some miners having some minor difficulty in increasing the blocksize, and deciding its not worth the hassle/lost profits.

[HappyTypist]

The consensus threshold wasn't reached. There was a maximum of 12% support (now there is less than 3%)