Like many, I spent several hours installing VS 2019 today. I decided to try the wipe/reload method and everything went well with two exceptions. I installed the Enterprise version of VS 2019 along with the Telerik & Kendo Developer tools. The control panel seems to not recognize the fact that VS2019 has Xamarin installed and thus I cannot install the Telerik UI for Xamarin toolkit. Previously, under VS 2017, I had not issues installing this package.
The second issue I encountered was odd. When uninstalling all items, via the progress control panel, the system erred on the Telerik Reporting toolkit. It seems "the account already exists" error occurred. The VS 2017 flavor uninstalled however the 2019 flavor refused. To work around the problem I was forced to do a repair then followed that with a successful uninstall. A minor inconvenience although I figured someone would like to know.
I would like to be able to install my Xamarin toolkit again.