Back in EU after a long time, advice on old bank accounts

Hi all, I recently moved back to EU after working abroad for many years. I currently have 3 bank accounts: US, CA, EU, all with a decent amount of money on them. I plan to start investing and I am thinking of moving all my money to my EU account (Nordea) and close the others. Is there any benefit in keeping them open? I guess not because if I invest with them then I have to pay taxes in a country I don't live in anymore (and I don't plan to go back there). But maybe there are benefits that I am