I was referring to this part:
The rumor is that it had planned the downsizing for a while, wanted the employees to be in the office to hear about it in person, and didn’t care how much risk it had to expose the soon-to-be-ex-employees to in order to make it happen.
i.e. making them come in to the office for the layoff notice, after it was known the public needs to social-distance and minimize gatherings.
That part is still bad, and it's not retracted, nor does Triplebyte dispute making them come in to the office to be informed of the layoffs.
In any case, it would be nice if he updated the original post with a link to the retraction, otherwise people won't see any unringing of the bell when they go back to that link.