In previous versions, spell casters were given bonuses to available spells based on their casting ability score. I don't remember exact stats but to make an example, A wizard would be able to memorize extra spells:
Int 14 = 1 extra lvl 1
Int 15 = 2 extra LVL 1
Int 16 = 2 extra lvl 1 and 1 extra lvl 2
Int 17 = 2 extra lvl 1, 2 extra lvl 2 and is required for casting lvl 8 spells
Int 18 = 2 extra lvl 1, 2 extra lvl 2, 1 extra lvl 3, and is required for casting lvl 9 spells.
I can't seem to find mention of this bonus in D&D 5th Edition. Does it apply to prepared spell limit, spell slots, or has it been obsoleted?
Note: I also can't seem to find mention of a prepared spell limit, or feats.