Unexpected huge update. Please confirm it is expected.

Hi,

Running |tlmgr update| I am today receiving 337 package updates on a 
system that has otherwise has constantly been kept up to date on an at 
least weekly basis.

Since this seems huge in comparison to the usual flow of update (in the 
range of at most 10-20 packages each time), it would be nice to know the 
reason why. This is almost a full rewrite of the texlive tree on my 
system, as if it was a full upgrade to a new year release. Please be so 
kind to confirm that it is expected and not the result of some issue, 
the worst of which would be an infrastructure compromise.

Thanks!

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