I can leave the company at will (respecting the notice period) but they cannot easily get rid of me. They can eliminate the role I'm in, but they must offer me

I can leave the company at will (respecting the notice period) but they cannot easily get rid of me. They can eliminate the role I'm in, but they must offer me a replacement if they can. Of course due to covid a lot of companies have to fire people and they absolutely can: the realities of business have changed. Firing due to poor performance is bit hard, but not impossible. Firing due to gross negligence is also possible and happenes, though you must really screw up to be eligible.