Maxperson
Morkus from Orkus
Do you know what "official rulings" means? It means that whatever is in the Sage Advice Compendium supersedes any advice offered on Twitter. That's it. That's the only significance--the SAC should be taken as the definitive recommendation, as opposed to "public statements of the D&D team." It does NOT mean that the Sage Advice is elevated to the level of rules, or that Jeremy's suggested ruling applies to anyone's game. It is still nothing but a suggestion, and if you follow the Sage Advice in your game, it is YOUR ruling, because the only one who can make a ruling in your game is YOU (assuming you are the DM.) Jeremy cannot rule on your game, that's not how it works.
If a DM makes a different ruling on a published rule than what Jeremy suggests in his advice, that is not a house rule. A house rule only happens when a DM implements a new rule, or strikes a published rule from his game. As an example, the statement that "if x, you can y does not impose a timing requirement and therefore the bonus action y can be executed whenever the player chooses during his character's turn" is a ruling on applying the published rule. By contrast, the statement that "the Shield Master shove doesn't require the Attack action in my game" is a house rule, because it is changing the rules of the game, not interpreting them.
That's not true. The official rulings are now game rules. From the Sage Advice link.
"We gather your D&D rules questions and occasionally provide official answers to them in the Sage Advice Compendium. As we headed into 2019, I went through the compendium and updated it to reflect the current state of the game’s rules. This update resulted in some old answers being cut, others being revised, and a few being added."
There you have it. His Sage Advice rulings reflect the current state of the game's rules. It takes a house rule to change them.