It might also be an indication that the police doesn't risk wasting the judge's time and get shitted on if they don't have rock solid reasons for suspecting someone.

Is a bit over 20k drug related warrants over 10 years really that much for the country the size of USA with such a drug problem and such an axe to grind with drugs users (war on drugs, private prisons, blacks with crack and teens with weed being juicy targets to boost statistics, etc.)?

Or 1300 warrants and 600 extensions in one fiscal year for a 'black bag job search' across all circuits?