As far as I know, MuPDF is not that heavy, and can view both PDFs and EPUBs (and others).
I personally use zathura, which is a very, very light weight document viewer, has vi style key bindings, and has plugins for viewing PDF, EPUB, CB, and others. Works pretty well in a keyboard centric desktop environment (I use Hyprland).
It was similar for me. From a single USB 12TB drive, to an old Qnap with 4x4TB drives, to a (now) revived Synology NAS with 4x18TB drives. I have several "servers" but they are USFFs with no room for so many drives.
It's a data maintenance feature that amends data in storage pools that are incorrect or incomplete. It works on BTRFS volumes or RAID 5/6 storage pools. It's scheduled to run monthly on my NAS. I guess it started now as I upgraded my drives from 4x4TB to 4x18TB.
And there are DMs who are pro-fail. I was trying to throw a child over a pit in the cellar floor, rolled something small (6 maybe?), kid fell in the 10 foot hole and insta died. 🤷
I have 300+ games in my Steam library, some of them with Linux builds, just a few. The rest work with Proton. I did not find a game yet that didn't work on Linux...
My wife is very much like you. She lived a hard, misunderstood life, noone in her family believing there's anything wrong. She had troubles in school too, but she was able to get two master degrees. In Eastern Europe, there is no ADHD, you just didn't get enough beating as a child. In the last few years, she also had issues at work, being called unfocused, that she talked too loud and too much, didn't try hard enough, but, like yourself, managed huge projects for corporations with tremendous success.
We got our kids diagnosed a few years ago, and all have ADHD (also dyslexia, tics, ASD). When we learned our kids have ADHD, my wife also got diagnosed, and it's textbook perfect for her. Very high "score" for ADHD. She got on medication (Ritalin), and, in her words, it changed her life.
She did have to adjust the medication through trial and error, going up and down in dosage until she found the perfect spot (I believe 25mg x2 a day) and even learned that when it's that time of the month she needs 5mg more than usual.
She can now sit for a movie or dinner with family, can remember stuff without a calendar, and even started going to interviews to go back to work after a long break. She is now part of a couple online ADHD communities talking with others like her and finding people that are not yet convinced they need to get diagnosed and /or medicated on Slowly.
She still obsesses about random stuff for days or weeks and then just switches focus to a new obsession, but hey :)
The last time I had an issue with Linux drivers was in 2002, trying to set up a pppoe connection. I had no smartphone and there were no YouTube, Reddit, wikis, forums etc.
Back in 2016 I helped install some wifi drivers on a friend's laptop in Ubuntu 16.04, which was not really a big deal.
I feel like these memes are made by Windows users :)
I instantly saw Sam Riegel :|