Splitting Your Portfolio Between Different Accounts

[megacorp-firee]

I am ready to FIRE... I have my money in the following different accounts

Schwab - Roths and and 2 residule stocks - about 10% of total holdings
Ameriprise - income producing preferreds and such - 20%
401K - 70/30 equities/bond AA - 60%
Cash in banks/cd's - 10%

I am considering taking 401K and rolling to Vanguard and duplicating the portfolio with VG index mutual funds.
An alternative is to roll 401K to Ameriprise and do the same with ETFs.

Question: what are the pro's and con's of having everything in one account
Thanks.