Sure, it's a different format. But you can always dig into man pages or other documentation to learn the details. Arch wiki is great for practical solutions - for example https://wiki.archlinux.org/index.php/HiDPI is the place to go to for hidpi display configuration. TLDP has not been seriously updated since hidpi even came out. Similar to https://wiki.archlinux.org/index.php/Power_management - there's no recent TLDP equivalent.

I appreciate TLDP for what it is and the details they go to. But Arch wiki can easily be read as a FAQ for all modern systems. And it will usually send you to other places for details (sometimes TLDP as well)