I've had my fingerprints taken every time I've been to the US, although not always all the fingers every time, presumably on subsequent visits if you have passport + right hand matches, they don't bother scanning left hand or thumbs.

I've certainly had the full scan on multiple occasions though.

Things have changed in the last 10 years. I recalled from 2016, while some countries like Sweden were super strict about entry/departure (lady manually counted number of days on passport) others had been so lax it was comical: France would take one quick glance at you and stamp the passport, Ireland would at least test if you could answer a simple question with the stamp already pre positioned on the passport upon answering said question.

I presume this electronic system finally accounts for all of these differences and provides a minimum standard for exit/entry. Now it being digitized there is no wiggle room on exit/entry. Frankly with how lousy US exit/entry seems for foreigners, I don't mind the EU wanting to maintain strict standards for visitors to their borders as well. I wouldn't even mind them being extra rough on us Americans. Its totally understandable. Preferably take all the US diplomat passports to a back room as well while they are at it.