What's a technology that was cooler in its older iterations?
Very much agree. I'd love if Valve would consider filling this niche considering the great success of the Steam Deck. A small clam-shell handheld sized like the GBA SP or the DS.
Canonical lifts lid on more Ubuntu Core Desktop details
Fedora Silverblue sounds like it fits what you're looking for.
How to start a career in IT/cyber security
Plenty of good suggestions in this thread. I'll add on that I recommend you read Alyssa Miller's "Cybersecurity Career Guide". It will answer many of your questions and provide you a roadmap to land your first job. https://www.manning.com/books/cybersecurity-career-guide?ar=true&lpse=A
