I will say 1:1 layoffs are very tricky logistically, and can be less humane in some ways.
If a manager has several layoffs to do, you have people waiting on pins and needles for the dreaded calendar invite over a few hours or even days.
In a layoff, it’s important to do it humanely, quickly, and let people settle down as soon as you can. It’s bad for both the laid off and the remaining employees you have a trickle layoffs happening over a longer period of time… it’s less bad if you rip the bandaid off quickly.
You want to be able to say to your team, “Hey guys, we had a layoff this morning, and everyone affected has already been notified. It’s all done at this point - everyone in this room is not affected.”
If I hear through the grapevine there’s a layoff happening this morning, and my manager schedules a surprise 1:1 with me in a few hours because he has a few of them to do, I’m going to be a wreck between now and then.
I've been through a group, but face-to-face, layoff. 150 people in that scenario would be very doable if you split that into like 3 groups.
1:1 would be even better, and I think that ought to be doable, too, yes.