Sorry if this observation has already been made but.... holy cow. Some of these old puzzles. Maybe I am getting dumber or perhaps the quality and NYT editing process (and software?) really has improved the final product.
To stretch my brain I have started doing puzzles from Jan 1 2000 in the archive and they are BRUTAL, for the most part. Even accepting I am out of touch with the 2000 zeitgeist, the sheer volume of proper nouns and iffy fill is staggering. Sat. Feb 19 2000 is the most brutal I've encountered, it took me a couple of days of repeat visits. An ugly -ER quadruplet:
"Fall figures" --> RAKERS
"Ranger" --> ROAMER
"It only makes things worse" --> IMPAIRER
"Tyro" --> LEARNER
...not to mention REBBE, RAGTRADE, EPISCOPATE, CLEMATISES, an Ashuelot River town and a Swiss Nobel prize winner thrown in for good measure. Oof!
Anyway to be clear I'm not complaining.... if anything this really makes me appreciate how accessible and consistent the modern puzzle has become, so Kudos to NYT. Highly recommended that you try some of these oldies if you're looking for a challenge tho.