I have been running a Developer Beta of the macOS ever since Sierra 10.12 arrived. It is handy to be able to test my mission critical software on the latest OS updates. I just installed High Sierra 10.13.4 Beta. It seems to be quite speedy. My main Apps work fine. I am sure all the latest Supplemental Updates will be included in 10.13.4. If you are interested you can sign up for the regular (not developer) program here. You really should install it on another partition than your main machine or on an external hard drive.