Dear Maciej Nasinski,

В Tue, 20 Jan 2026 11:57:49 +0100
Maciej Nasinski <[email protected]> пишет:

> Because so many packages depend on Matrix, this change effectively
> raises the "floor" for a large portion of CRAN to R 4.4.0. Is it true?

Ideally, only for those depending on Matrix (>= 1.7-0), currently
CoTiMA, FlexRL, gamm4, matrixCorr, organik, and their strong recursive
reverse dependencies (29 more packages via gamm4).

If the dependencies of the remaining packages are truly satisfied by
Matrix < 1.7-0, installing them shouldn't pose a problem, as Matrix is
likely to be pre-installed as a "Recommended" package. Even if it's not
installed and the distribution source code is missing, it's still
possible to download a matching version of Matrix from CRAN, e.g.,
from https://cran.r-project.org/src/contrib/4.0.0/Recommended/.

Still, it's a reason to worry, because most developers don't test their
packages with the minimal version of every dependency installed (some
CRAN packages even have dependencies on minimal versions of R that
don't exist!). There may be packages that effectively depend on a later
version of Matrix and don't know it.

-- 
Best regards,
Ivan

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