There has been a recent tightening of the interpretation of IR35 by HMRC which has been applied to the public sector first. I imagine it’s to this that the comment you’re replying to is referring.

(Essentially as I understand things they’re no longer allowing contractors to make the decision as to whether they’re inside IR35 or not, but making the companies paying them make that decision & bear the liability for getting it wrong.)

I don’t believe the new rules around perma-contracting were ever applied to the private sector. Even the public sector guidance is dated 2017[1].

[1] https://www.gov.uk/guidance/off-payroll-working-in-the-publi...