8G is paltry on a desktop computer that should last years.
If Apple was asking $600 that might be OK, but at $1600? How many laptops at that price point have 8GB RAM? Heck a $400 Steam Deck has 16GB.
Manufacturers want to have a computer with enough memory that it never feels like a constraint to the user (and blog posts like this one enjoin them to do that).
At the same time, developers of software want to consume as much memory as possible-- up to the point where they've used it all and any extra becomes noticeable as perf problems to the user.
So Apple keeping their default memory offering low could be seen in a certain noble light...like honoring a nuclear non-proliferation treaty.
When people say they need 16gb of ram to have a browser with 200 tabs, a chat messaging program, and an audio player I really wonder what they're smoking. That could be done on maybe 4gb, 8gb would make it easier to handle things like tabs with high resolution video.
You only NEED ram for what is actively being used. If you aren't actively using 199 tabs, you don't need them in memory.