Worst case in 2021 should be a daily full backup + transaction logs. That's enough to get you point in time recovery.

On AWS, EBS snapshots are incremental (I didn't know that until studying for AWS certification), so you could schedule a snapshot every 5 minutes if you wanted.

Looking at the timeline, I'm just gonna repeat something I said in another thread this week: it's easy to underestimate how long it takes to do basically anything with a few hundred GB of important data.