@Xian2
Again, the difference between leaving the money in the Roth 401k account or moving it to an IRA really depends on your own convenience and the investment choices available.
Both the Roth 401k account and the Roth IRA account follow the 5 year rule, if you withdraw earnings less than 5 years after the account is open, they are taxable, even if you are over age 59-1/2. If you don't already have a 5 year old Roth IRA, then I think doing a rollover from the 401k to the IRA will start a new 5 year clock, even if you already met the 5 year clock on the 401k ( @dmertz will tell me if I am right or wrong). So, knowing when you might need the money might also influence your decision.
