Its presence in spin-off games like Pokmon GO ensures that it remains relevant and accessible to both new and old fans alike
coupled with its lower damage output (160 damage) and heavier KO penalty (like all EX Mega Pokmon, Mega Latios EX being KO-ed instantly costs you the match), this makes it very undesirable to use seriously
With the format being in generally fast, lands are not really allowed to come in tapped, especially not when facing constant pressure of early threats like Ragavan or DRC
Let's say I play a Brainstorm as an Ancestral Recall using Richard's ability
Outside of these upgrades, we get an improved mana base, with channel lands and Mishra's Foundry, and a few sideboard improvements, like Reckoner Bankbuster for more card draw against control and Unlicensed Hearse over Lantern of the Lost for graveyard hate