I think that besides unverified packages, lack of repositories (for example, for FOSS only) is the main problem of Flatpak rn

Obsolete means it's unmaintained (not true) and outdated because many packages get updates with noticable delay - it's a tradeoff for being stable. Besides not seeing new Linux goodies on release day, some devs force you to add additional repos for their apps which can lead to broken dependencies in the future.

OsmAnd rocks imo but Organic Maps is also great.

They are targets of American spyware.

• Obsidian - great markdown-based note app
• NewsFlash - fast and elegant RSS news reader
• Bottles - program to run Windows apps and managing them easily
• BreakTimer - a life-saver for me; it allows you to set a break after given amount of time
• LibreWolf - privacy-focused fork of Firefox

There are a lot of awesome programs on Linux, I recommend browsing Flathub to find them

• https://tilvids.com/c/johnny_marks_channel/videos?s=1 - Some video essays about movies and games
• https://fedi.video/c/lontv@peertube.lon.tv/videos?s=1 - It's now abandoned but you can find some tech-related videos here

And like many people mentioned here, TLE, Veronica Explains and Tilvids are also worth recommending.