In my 20ish years I’ve done every possible day for oncall schedules. I would say each have pros/cons but overall I found it to be a minor difference.

Mon-Mon is nice because it’s a logical time to start something fresh at the start of the week. Tuesday is good for the reasons in the post, Wednesday is similar. Thursday is nice because after you’re done you can relax on Friday. Friday-Friday is less common but can be nice because you get the satisfaction of being done on the last day of the week.

Where i work we do Friday 8AM -> Friday 8AM. We changed to that from a Monday->Monday a few years ago. Feedback has been postive. Coming off of on-call on Monday morning was just a major bummer.