Is there any advantage to investing directly with a transfer agent nowadays?

In the early 2000s I started investing with a transfer agent because a lot of the stocks I wanted to buy I could basically do for free compared to the $10+ per trade commission that came with most brokers.

Now since most brokers are free to trade is there any point? Transfer agents do have some minimal fees for buying each month and other fees for when you want to sell, plus the time it takes to buy and sell is now a factor, so I'm wondering if I should finally move them to a broker.