With Lethality the way it is question

And the prevalence of , was somehow made even worse than it was? I've found to basically lose all effectiveness if they somehow get MR, which used to mean , or Lifesteal (usually just countered by Warlord's Bloodlust if they took it). Is there ever a situation really right now to take Thornmail? I mean so many Lethality users also want and that your armor is basically gone.

Sorry if I am beating a dead horse. I am genuinely curious if I should just take it out of my item sets so I don't buy it :)