I have no actual experience with Microspline yet, but if it is like other DT hubs it should be convertible with end caps. It may need a specific microspline end cap, much like XD has a specific endcap. (But the XD endcap isn't actually "that" specific" in my experience)I am looking for Microspline compatible 135 hubs. Looks like DT only comes in 142, Shimano is out, White Industries seems to fit the bill. Any others??
I think I heard or read somewhere that DT isn't making QR endcaps for Microspline. I remember thinking it made sense, actually -- if you need the alleged newest/latest/greatest drivetrain you probably aren't interested/invested in QR skewers.
Probably easy to take an existing DT QR endcap and machine it to fit tho.