There’s no chance the courts will nix the deadline, will they?
Given that the language of the amendment specified that it needed to be ratified within 7 years, the amendment failed in 1979 under its own terms. When Congress gave the amendment three more years, it was of doubtful constitutionality (if Congress wanted to resubmit the amendment, state ratifications should have started from zero and states that ratified before 1983 should have been made to reratify it), but in any event the second bite at the apple expired in 1982 and the proposed amendment died at such time. The 27th Amendment precedent is inapposite, given that such amendment did not have language setting a time limit for its ratification by 3/4 of the states.