I keep up with the Beta releases of macOS Catalina pretty closely. Apple just release Beta 4 of 10.15.4. I don’t think it will be long before the 10.15.4 update for Catalina will be released. The install went fine. All my main workflow Apps work great in this release. And, it is still very snappy, very responsive. There are a couple of new features in this next update, but I will cover them when it is finally released.