There are also GreenArrays chips, like the GA144.[1] 144 cores on a chip.
The downside (or upside) is that they're desgined for running Forth, and are not x86 compatible.
http://www.greenarraychips.com/home/documents/greg/PB001-100...
Most of what we do is pretty parallel: web hosting, servicing requests, databases, hosting tons of VMs and containers, etc. I don't buy it.
My guess on Phi is that it wasn't a big win over fewer deeper cores and so there was not much market. This might change things a bit.
Our current programming paradigms don't adapt well to massive parallelism, except for some small classes of "embarassingly parallel" problems (e.g., make -jN).