I installed ubuntu for my mother, she just needs to download pdfs and read pdfs, look at images, use gmail. Sometimes she opens a document with LibreOffice, but no power usage.

Seems to work, the maintenance is also now super easy, ssh, update. Something wrong and she needs support? I ssh, open up a tunnel and connect via remina to her desktop to explain.

I had a situation once when Ubuntu did literally not go into the Desktop Environment anymore, but all I did was update and upgrade packages and it started working again.