You may not get the full wattage through a dongle. For example, the Satechi adapter with pass-through charging (recommended by The Wirecutter at https://thewirecutter.com/reviews/best-usb-c-adapters-cables...) is limited to 49W: go to https://smile.amazon.com/dp/B01J4BO0X8/ and search for "Important Notes". 49 watts may be enough for many uses, but (as I discovered recently) not when running a job on all the cores of a 15" MacBook Pro.
Now, presumably the designer of this dongle had some reason to limit the power output. Perhaps the heat dissipation is not enough (the dongle gets pretty hot even when using it just for USB and HDMI). What if some other manufacturer is not so careful and allows negotiating more power through a similar device?
Now, presumably the designer of this dongle had some reason to limit the power output. Perhaps the heat dissipation is not enough (the dongle gets pretty hot even when using it just for USB and HDMI). What if some other manufacturer is not so careful and allows negotiating more power through a similar device?