Are there any mechanics which consider your whole stat, rather than your effective bonus?
Friend and I were discussing 'blessed objects that probably aren't as powerful as they look on the surface' and one that came up was for things that somehow give you 'more stat points' but specifically don't increase your stat bonus - so if you have 10 base, put on the ring of phantom strength for 1000 strength, you still have a +0 bonus, if that makes sense.
So really we were curious about which systems in DND5 use the 'whole stat' rather than the effective bonus.