The C++ community moves slowly for the most part, particularly when it comes to tooling like build systems.

From a quick glance most of it looks pretty relevant to me.

Yep. Anything less than 10 years old is new & untested, anything less than 20 years old is new but probably decently common. Give a tool about 40 years to reach mass adoption (to the point that earlier tools aren't seen often).

Feel free to link to a more up-to-date tutorial

Or update things that are dated now. I’ve been mostly keeping the max version up to date but haven’t bumped the min version yet. I’d like to make it 3.11 or 3.15 in the near future.