Visual Studio 2019 will be the last version of Visual Studio with load test features.
As of right now, we have no plans to drop support for Visual Studio multi-step tests, and (although this is not a guarantee), we do not intend to drop support for them without a 1 year lead time, a sufficient replacement, and migration guidance. Visual Studio 2019 will still have the ability to write multi-step tests, and the support lifecycle for a Visual Studio product is 5 years. My recommendation is to continue using Visual Studio multi-step web tests.
via Morgan Grobin, PM on Azure Monitor