Most of my biology collaborators have switched in the past 5 years to putting all their new submissions on biorxiv. It seems like medrxiv is now getting popular

Most of my biology collaborators have switched in the past 5 years to putting all their new submissions on biorxiv. It seems like medrxiv is now getting popular since COVID started too. But, as in math and physics, I guess a big problem is articles that predate this change are still paywalled in many cases.