So if you're just playing friendly matches with people before an event, does anyone say anything about the old cards if you use them, or are people pretty cool if you have a mixed deck?
That thread helped a bit, but because it's out of date, and likely not to be edited to include the newest editions for a while, you should make a spacer and then post which sets are banned. This way instead of looking at what is legal, wondering if the set you're looking at is newer or not, and then deciding legality, it'd be easier to use an appendix below that has all the banned sets for each format.