how to scare people
There is no change in legislation apart from doing the IR35 assessment is a mandatory thing. Obviously all the bullshit you can read on the internet is just to scare people and it's why media are used by HRMC to do that.
Obviously all the contractors who work through agencies can sleep well as they are not at risk as they have to be outside IR35 and contract should be written in a way they are outside IR35.
Companies who got rid of contractors made only use this legislation "change" to justify that. It has nothing to do with that change and ultimately they admitted to use contractors inside IR35 by doing that.