Most of the crypto in the OP requires trusted setup phases and is too slow to use for any kind of general-purpose computation. It's the reason why most cryptographic protocols consist of simpler schemes and don't try to do everything. This article is click bait though. Feel like OP just stumbled upon what people have been doing for the past 5 years and wrote this half-baked article on it.
This was true 3 years ago but not generally the case anymore. There's been significant advancements to move away from trusted setups and the speedups with current methods are quickly approaching viability.
List some
0xparc is a research lab. They may be wrong or mislead, but they work on this stuff every day—it's not some guy stumbling across something.
If they are research labs then this article feels like was written by junior researcher they just hired and he is so pumped.
But this stuff is not going to replace current state of things as article claims.
Where are their novel papers?