The LinearAlgebra`MatrixManipulation` package

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The LinearAlgebra`MatrixManipulation` package is now obsolete in the latest version of Mathematica, rendering commands like TakeRows, TakeColumns, AppendColumns, and ZeroMatrix outdated. Users can replace these with kernel functions such as Join and ArrayFlatten for appending and flattening matrices, while Take can be used for row and column operations. There is concern about whether the new functions perform the same operations as the old ones, raising questions about compatibility and functionality. Users express frustration over the lack of support in Mathematica forums compared to alternatives like Maple. Overall, the transition to new functions requires users to adapt their existing scripts and seek additional resources for guidance.
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The LinearAlgebra`MatrixManipulation` package is now obsolete with the new version of Mathematica.

Say you had an existing script with commands:TakeRows, TakeColumns, AppendColumns, ZeroMatrix, AppendRows (which are also obsolete)
Mathematica says:

AppendColumns, AppendRows, and BlockMatrix are available in the Mathematica kernel functions Join and ArrayFlatten.
TakeRows, TakeColumns, TakeMatrix, and SubMatrix are available in the Mathematica kernel function Take.

The later has four commands which use one now. How do I know if it's performing the same operation?
 
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Where else can I ask about this? The Mathematica forums aren't much help. Too bad it didn't have as much support as Maple.
 

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