Wiseblood
Adventurer
Only if you insist that all tasks must be possible by all actors. If you instead have a band of tasks that apply to a character of a given level, with tasks below that level becoming automatic successes, and tasks above that level still out of reach, then you have a potentially infinite range.
I was largely talking about 4e. Where alll characters are advancing at the same rate. Offensively, and defensively read as attack bonus, AC/Ref/Fort/Will. I understand why these increase but if you also increase damage you have to increase hit points. If only offense and defense went up HP damage could safely remain the same. More skilled apponents would be very difficult to harm by less skilled apponents.
Conversely if damage and hit points were to increase instead of offense and defense characters and creatures would be more deadly and more resilient thereby creating a limitation on who would be able to deafeat them.
Having both go on at the same time is really just increasing the amount of time to resolve an action by having more(bigger numbers) math.
If you disagree that's cool. The players sitting at my table IMO take a long time to sort through all of the bonuses and penalties and resolve an action.
Correction: Cumulatively they will take a long time wasting just a few more seconds each round for every combat and the rate continues to climb because of the ever increasing numbers due to leveling.