If You're Not Taking Teleport Top, You're Trolling Yourself and Your Team
With the new changes to turrets, early turret damage merits early gold and that means players need to be present in lane to either capitalize on that OR at least defend their turret.
With top lane so far out of the way and being a solo act, it is only logical to conclude that with the early gold threat that plating provides, the top laner NEEDS to do what they can to remain present in lane. And teleport is the spell that helps provide lane presence.
Who cares if you take ignite and get first kill? You'll have to walk back to lane while the enemy laner teleports in, chunks off a couple plates and out farms you in the process.