Use system specific tags for the Fate variant you are playing always, unless your question truly transcends the Fate variant boundaries.
The question about Fate point arms races was about Fate Core and Fate Accelerated. An answer that starts with "Well, Dresden Files has X subsystem which means [useful resolution]..." is not going to be useful or helpful or even relevant to Fate Core/Accelerated. If it can be ported, a good answer should say how it can be ported.
If the issue is relevant to other Fate variants, that doesn't mean we should retag it. People using other Fate variants can learn from this question about this variant. It happens all the time with our D&D tags: people don't retag a dnd-3.5e question about armor with dnd-2e or dungeons-and-dragons because other editions also had similar armor mechanics; that's irrelevant and people from those systems can learn from this 3.5e-specific one. Same thing here: it relevant to other Fate variants and Fate in general, but that doesn't mean we should be retagging it. Use the system tag for the Fate system the player is actually using.
(This pretty heavily overlaps with Bradd and SSD's positions, but I felt it was worthwhile to bring this specifically up and from the asker's perspective)