Morkus from Orkus
The difference is significantly better than rolling. +1 or +2 is pretty insignificant. You generally can't tell the difference during game play. Feats on the other hand are very noticeable and helpful. I would have to modify or it's very unfair to the 2014 characters.This is not what compatibility means.
Your example of feats vs no feat works well enough. The difference is no bigger than the differences which you have when ising the default generation method: rolling stats. So no modification needed.
Similarly, if I allow the 2014 characters to crit, including smite and sneak attack, but deny the 2024 PCs, that's unfair to the latter.
Being able to crit the 2014 PCs, but not the 2024 PCs is going be super unfair to the 2014 PCs, especially since it's likely that monsters will be modified to do more damage to compensate, so those crits are going to hurt more.
By definition ANY work makes it not backwards compatible. That's different from being partially compatible, which is what the game becomes. I will have to modify the game to make both work nicely together.But of course: allowing 2014 characters to chose an extra feat would be fair.
But is that so much work that youvd call that incompatible?
Until Windows 7 was backwards compatible to dos... and later windows were backwards compatible towards win 95... i think there were a lot more problems than just telling every player, here is a freeby.