[matthewaveryusa]

>Of course, you can use a Fidelity account to own Vanguard ETFs if you wanted.

Which I would highly recommend if you ever want to change brokers. the fidelity ZERO products are great but can only be held at fidelity while VOO shares can be transfered to any broker.

[robocat]

I presume the main advantage of transferring shares is to avoid taxation on realised gains. Secondary is to avoid transaction fees?

I sold and bought recently (because transfer looked like paperwork hassle to me): had a small transaction cost, and the main disbenefit was losing transaction history e.g. buy date was now reset; it was tax neutral for me either way.