If you move to the new USB-C-based MacBook Pro, you get a lot but you give up a lot. Despite the Pro moniker, the latest high-end MacBooks don't have an SD card slot, an HDMI slot, or even a traditional USB slot. Fortunately, there's Other World Computing. The company makes a lot of accessories that fill in the gaps in Apple's product line. I was able to try a pre-release version of the OWC Thunderbolt 3 Dock ($299).
Why you shouldn't buy a new MacBook right now
Apple is reportedly gearing up to launch new laptops soon, so don't buy a new MacBook or MacBook Pro right now.