I just upgraded mobx-react from 4.0.4 to 4.4.3. In theory, this should not have required any code changes. However, starting in mobx-react 4.1.2, there was something that tickled what I'm guessing is a hidden bug in Enzyme 3.3.0. We had a test that would purposely throw an exception in the render method of a React component. The test was written using shallow. Even once I had gotten the test to pass in mobx-react 4.1.2, it was somehow poisoning something unknown which caused about 0.5% of my other tests to fail. It was perfectly reproducible if I ran all the tests, but running any of them individually would not fail. It was quite baffling. My buddy Kevin figured out that moving from shallow to mount fixed the issue, inexplicably. It's a workaround, but we'll have to just live with it since I have no idea how to find the bug in Enzyme. Note, we're using React 15.6.2 and MobX 2.7.0.
I decided to give Ubuntu 20.04 a try on my 2015 15" MacBook Pro. I didn't actually install it; I just live booted from a USB thumb drive which was enough to try out everything I wanted. In summary, it's not perfect, and issues with my camera would prevent me from switching, but given the right hardware, I think it's a really viable option. The first thing I wanted to try was what would happen if I plugged in a non-HiDPI screen given that my laptop has a HiDPI screen. Without sub-pixel scaling, whatever scale rate I picked for one screen would apply to the other. However, once I turned on sub-pixel scaling, I was able to pick different scale rates for the internal and external displays. That looked ok. I tried plugging in and unplugging multiple times, and it didn't crash. I doubt it'd work with my Thunderbolt display at work, but it worked fine for my HDMI displays at home. I even plugged it into my TV, and it stuck to the 100% scaling I picked for the othe