For the sake of balance, I will note that in cases of negligible non-practice, the remedies available to the tenant to take advantage of the situation are limited. To the extent that the tenant seeks to rescind the lease on this ground, the landlord may object to it on the ground that he is interested in remedying the breach of contract. Or claim that the cancellation of the contract on this ground is unjust.
To the extent that the tenant claims compensation, these can in any case be quantified at the discretion of the court. And even if the tenant insists on enforcement, then the landlord may claim that enforcement in such a case is unjustified in the circumstances of the case.