“Well, someone at Microsoft who wields great power has made the decision that features such as hot reload cannot be given away for free as part of the open source .NET SDK anymore.”
Hot reload was finished code, a headline .NET 6 feature. Microsoft ripped it out of the open source SDK weeks before release to make it a Visual Studio exclusive. The open source pitch lasts until it threatens a paid product. Everyone building on .NET just learned where the line is.