Air filter

Looking for experienced opinions...  These pics are of the inside and outside of my air filter and pre filter.  I know it's fairly dusty and in need of a compressed air blow-out.  But with dusty air filters being a result of normal use, it means it's doing its job, am I right?  Give me your honest opinion, does it look bad enough to restrict airflow enough to cause an engine to overheat and seize the piston and rings?  Does it also show any signs of allowing debris ingestion into the engine top end?  I appreciate any opinion from experience.