Myth vs
You can take care of aggro threats with board wipes like Crippling Fear, or counter early- and late-game spells with cards like Counterspell
The nice thing with Maze of Ith is that you can use it to untap your own creatures, like those with an attack trigger, so you can get whatever activation you want and keep your creature out of harms way
Now the only way an opponent could evade infect damage would be to always have a chunk blocker ready, exile Plague Myr, or enchant it with a Pacifism-type aura to prevent it from attacking and blocking
Throughout, Wizards of the Coast has consistently added new mechanics and abilities in each subsequent set, some of which have had a bigger impact on evolving deck-building strategies and the overall meta
With the addition of Unholy Heat to Modern, not even Lightning Bolt has been able to fully withstand the power creep of the last few years, and I personally would place it below Unholy Heat in power level when taking into consideration the context of the Modern metagame