That's not actually a lot.
This 30% comes after at least as high a percentage already left in the half year after the narcissistic sociopath took over.
Pretty much everyone I was subbed to was already gone, either account closed or inactive, by the time I closed my account.
And my Twitter account was almost as old as my Gmail account. I accrued a rather substantial list of people I followed through the past nearly 2 decades.