IR35 killed contracting a few years ago (it did for me and many of my friends, anyway)
The phenomenon that presently affects your job prospects is the tens of thousands of good developers being laid off from FAANG companies and suddenly competing with you for any open roles.
Recruiters within my employer (a mid size tech firm) are keenly hoovering up ex-FAANG engineers. In fact roles are being filled by ex-FAANGers referring FAANGers.