It's really not about fun or ease. This is a discussion of purpose.
1e, 2e, and most of the OSR have rules designed for the purpose of creating the feel of what 5e calls Tier 1. HP are low and slow. Spells are few and heavily tilted to strategic interpretation. Skills are more assumed. The games play best when you act least like heroes.
3e, PF1, and 5e have rules designed for the purpose of creating the feel of what 5e calls Tier 2. HP grows fast. Your states describe your elite status.
4e, PF2, and PH2 have rules designed for the purpose of creating the feel of what 5e calls Tier 3. HP starts big but grows slowly. PCs and monster quickly grow to their expert status and play as paragons of their attributes.