OpenTK was added to allow OpenGL plottables (#2565), but OpenGL plottables have caused some confusing issues (#3008, #3007, #2950), and they have minimal performance improvements over the standard plottables.

OpenTK throws warnings like this frequently too:

Warning NU1701 Package 'OpenTK 3.1.0' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8, .NETFramework,Version=v4.8.1' instead of the project target framework 'net8.0'. This package may not be fully compatible with your project.

This issue will track removing OpenTK, FormsPlotGL, and WpfPlotGL from the standard control packages. This functionality may get added back into separate packages, or maintained here for extremely advanced users.