Buying new hardware might be slightly over the top but it's essentially my experience with losing a Gmail account. The hijacker was extremely fast trying to get into my Amazon, PayPal, bank, credit card accounts and trying to steal my identity. The whole situation was awful.

I was stupid and used poor security which made it easier for this person (who was also probably using data from the Equifax leak for social engineering). But I wouldn't fault someone for erring on the side of paranoia.