Another awesome benefit, from a basher/casual racer, is that you can parallel charge many packs at once. With a board like this:
https://www.readymaderc.com/products...signature-line

An iCharger 4010duo that can do 40 amps per side can charge 8 - 5000mah packs in 30 min. 4 packs on each side of the charger, using two parallel boards.

So you have 4 batteries charging at 40 amps which is about 2C if they are 5000mah packs. Each battery getting 10 amps.

Of course you can do 10 batteries per side at a lower charge rate too.

I charge all my packs while I pack up for the track, then when I get home I can stick all the discharged packs on one side of the charger together and put them at storage voltage.

The other side of the charger can be used to discharge any packs you didn't use down to storage voltage.