Without Chronicles we wouldnt have the Reserved List, and without the Reserved List cards would devalue like mad immediately after their first reprint
Usually if you are blue, playing Tamiyo and got her to ultimate you have the kind of deck that has lots of great things to pair with her
On top of that, Nekroz of Trishula has a great effect while its in your hand too: You can discard it any time your Nekroz monsters would be targeted by a card effect, to then negate and destroy the activated card which provides your monsters with some amazing protection
Primeval Titan While it is beloved and nostalgic, the amount this card accelerates is massive and can really dominate the game
For everyone who isn't Tron, the key is to outlast Jund
I dont remember what SM era was like, but with SWSH and SV it seems like weighing is not really a big concern with the new code cards