If you're gonna reference the wiki, cite the right article[1].
Under the 'GPU Offloading' heading (the feature most folks want in dual discrete/integrated laptops):
> Note: This setting is no longer necessary when using the default intel/modesetting driver from the official repos, as they have DRI3 enabled by default and will therefore automatically make these assignments. Explicitly setting them again does no harm, though.
I had to do nothing out of the box to have a working PRIME setup on my work laptop over a year ago, and I'd never used a laptop with discrete graphics prior. My only driver issue was with DisplayLink (proprietary), where I had to pin xorg because it wasn't compatible with 1.19.