Librem5, PureOS and Mate

I am waiting for my Librem5 soon and I would like to ask two questions:

  1. Would it be possible to install PureOS with the Mate desktop instead of Gnome?
  2. Would it be theoretically possible to install the Librazik3 distribution (music oriented and in French language and running on Mate) instead of PureOS? I suspect that it would not be possible to manage heavy music projects but I ask the question for the pleasure of curiosity … (
    Thank you in advance,
    Yours sincerely,

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