Marques Brownlee is a kid who did shitty reviews of cell phones and is now a tech influencer, not an objective auto industry reviewer. He knows jack shit about the auto industry. Whatever comes out of his mouth is designed to make his clients - the companies who pay him to pimp their products - look as good as possible.
Rivians are wildly heavy and inefficient compared to the rest of the industry. The R1T weighs more than two of the heaviest version of the Ioniq 5, for example.
R1T owners seem to average about 2mi/kwhr, whereas the Ioniq 5 gets almost twice that...
Its fitting he would think the reference in EVs is the Model Y of all things, the technologically outdated, slow charging car whose sales are falling off a cliff while the manufacturer is trying to upsell you a monthly subscription for lane keeping.