(2/7/2025) "Max speed [ability]" means "As long as you have max speed, this object has [ability]." If the granted ability functions in a zone other than the battlefield, the max speed ability does too.
Think of all the extra basic lands, the extra Seize the Spoils copies you pulled from Secrets of Strixhaven , the Goldvein Picks from Foundations , or the many commons, uncommons, rares, and mythics that dont see as much gameplay as the staples in various formats
It can be a tricky graveyard enabler since you can activate it multiple times to set up a big Patriarch's Bidding or find a silver-bullet target to reanimate with Goryo's Vengeance
Generally, Im not a fan of Enlist, as its better to go swinging with the team than push for using the Enlist cards
Short story longer: Previously, the way we handled duplicate protecting reprinted cards depended on whether we considered it a "full reprint" or not
The fact it's one of the few things being transitioned to the upcoming TCG Live is a sign of how loved this feature is