Clearly those working on the VS SSIS Extension have a lot of other development priorities.
However it is in Microsoft's best interests to have their community rapidly adopt the latest releases of their product. That is a core part of the value proposition of the Visual Studio Subscription. Often you must be on the latest released to take advantage of the latest Azure Technologies.
SQL Server is a core part of the Microsoft offering. The lag in the release of critical extensions like SSIS & Reporting is a roadblock to an entire enterprise upgrading to the latest version of Visual Studio. No-one wants to maintain two different versions of a development tool thru the org. It creates confusion & bugs.
Unless the VS release had some major breaking change. You'd think someone senior in Microsoft would ensure sufficient focus was given to ensure backward compatibility of these extensions. so that they could be available close to the release of a new version of Visual Studio.