So I'll turn the question around and ask you: what exactly does a more complex system of bonuses, in which there are a variety of bonuses that can stack, get you that's actually better than the Advantage/Disadvantage system?
I am not of the opinion that it is better, nor am I of the opinion that it is worse.
Probably subjectively better right? What is better (and the degree to which it is better) is pretty subjective and dependent on game style and preferences.
Of course it is subjective per person. But what I meant that it was an objective step forward. As in, an improvement that everyone can agree on.
Take the reverse armor class system for example, from 2nd edition. I think everyone can agree that there is no need for it to be in reverse, right? So when we switched from 2nd to 3rd, pretty much everyone in my group agreed that this was a clear improvement. Just like getting rid of the thac0 system felt like a clear improvement. Sure, you could still consider it a subjective opinion. But there's something objectively more logical about the later systems.
It seems, by emphasizing storytelling, you are shifting the goal posts a bit. The original issue was about whether or not significant changes where made (to warrant the change from 3.5e to 5e). Not whether or not they had a significant effect on storytelling.
I am not the one who shifted those goal posts. My original point was that the advantage/disadvantage system did not feel any different from 3rd edition's bonus system. Someone else then remarked that the stacking bonuses of 3rd edition got in the way of the narrative, which I strongly disagree with. I think if you're going to discuss a topic, you shouldn't let the arguments of the other party slide. Discussions evolve.
It is an odd shift in discussion as you are now saying rules don't matter to story telling, and if that is the case - why would that be different in 5e?
It is not an odd shift. If you've been following the discussion, it is a natural progression of the argument. And no, it wouldn't be different in 5th edition either. I never made such a claim.
Heck, some people play D&D with little to no storytelling (or what I would call storytelling).
Some people play it as a none stop combat simulator. But, that was not what I was addressing. (although I do have a strong dislike for the combat driven focus of many of these sorts of campaign modules.)
I think the issue might be that you are comparing 3e and 5e as if they are trying to be/do the same game/thing, when in fact they aren't.
They both are placed on a similar d20 chassis with similar lore, but they diverge (if they didn't we wouldn't be having this conversation at all).
3.5e is a game that has a strong element of crunchy numbers and zillions of options. That's a 3.5e feature.
5e is a game that intentionally simplifies crunchy options, numbers and choices, with a shift to on the spot, no rules (nor precedent) DM adjudication. That is a 5e feature.
They are doing two very different specific things, and presenting those as features of the system.
I disagree with that last sentence. I don't think they are doing two very different specific things. Yes, the focus of 5th edition seems to be simplicity and accessibility. But when you look at the actual rules, I don't notice a big difference. It feels too much the same. I don't criticize 5th edition for not having all the number crunching of 3rd edition. I criticize it for being too similar to 3rd edition, and not fixing the flaws in D&D that have been there since day 1. If you're going to release an edition that feels almost identical to previous editions, but with less in it, then that is not an improvement in my opinion. I still would recommend it for new players, simply for the fact that it is easier to get into. But for a seasoned player, I really wish they would have taken it further. It really feels like they were afraid to stray too far from previous editions, and that's a missed opportunity in my book.
And no doubt someone will bring up 4th edition. I know that didn't work out too well. But the last thing I would criticize 4th edition for, is for trying something new. At least they tried.