Welcome to the Forum, @amram3! 
The last time I remember seeing anything from Wyze specifically regarding security systems for businesses was in an announcement in May 2024. They emphasized business use in a video in that topic, but I don’t recall seeing anything specific to business use since then, so that has left me feeling like they were going to try to get into business security and dropped the ball. 
I agree that knowing more detail about your situation would guide any recommendations and answers to some of your questions (for instance, why do you want to change from your current DVR solution?), but the short answer is that I don’t think current Wyze offerings would really replicate what you currently have.
That’s correct. Reviewing microSD recordings requires the use of the owner’s account (whichever Wyze account actually added the cameras, not an account with “shared” access) and the Wyze app. Access to microSD recordings is not currently available in Web View, though this has been requested in the Wishlist.
You might be able to do that many feeds with Web View and an appropriate subscription, but if you want full-featured access to your cameras with the Wyze app (for instance, if you were using large tablets as your “workstations”), then you’re going to be limited to 4 cameras on screen at a time. With the app’s Monitoring tab, you could set up 4 pages (maximum of 4 cameras per page) and easily swipe between those, but it wouldn’t be a 16-camera simultaneous feed onscreen.