This is not a trivial task. With such a heavy reduction and how entire teams have been completely decimated, there will be a lot of lost knowledge. I'm sure there will even be cases where the people who stay don't even know what knowledge was lost.
All that puts Twitter in a very risky position, specially in a product of such complexity that does a lot of things in-house. It shouldn't be underestimated.
This is not a trivial task. With such a heavy reduction and how entire teams have been completely decimated, there will be a lot of lost knowledge. I'm sure there will even be cases where the people who stay don't even know what knowledge was lost.
All that puts Twitter in a very risky position, specially in a product of such complexity that does a lot of things in-house. It shouldn't be underestimated.