What do you want to customize? That could give us some things to suggest. I might suggest installing KDE desktop environment and trying it out, it is super customizable and theme-able right out of the box.
I’m pretty sure you can print to PDF or save as a PDF in libreoffice.
People who care about privacy use cash.
CEC is working well so that’s all handled! And my Jellyfin server takes care of any transcoding but most of my files are just able to be played directly.
Honestly I think it will be a flop.
I’m happy it was me too, I love my steam deck!