Not entirely the case. Some Micro USB can currently charge just as fast as USB-C. From what I gather. QC 3.0 is the current generation standard found on many Micro USB. This is considered Fast Charge. QC 4.0 is the next generation that will be coming soon(ish) and only going to work on certain devices. Unconfirmed/unknown if the S8/8+ will be included. It meets the requirements, but that's up to Sammy I guess. Chances are it will. Anyway. 4.0 will be only on USB-C and can be up to 20% faster than current 3.0 fast charge. Problem is waiting for 4.0 tech to arrive and manufactures to take advantage and create products with it. That could take some time. I'd say your best bet is to settle for a 3.0 as it can be months (if not longer) to find a good 4.0/USB-C mount you like on the market.