I haven't been through the new IST, but of the ten busiest European airports, MUC at #10 is the only decent one.
CDG is a compartmentalized mess where the parts don't fit together well. Of course, it's all (excepting the 2F lounge lobe) designed by the same architect (Paul Andreu), and non-operability and occasional lethal structural failure are hallmarks of French monumental architecture of the period (cf. Centre Pompidou, Opéra Bastille, BnF Mitterrand). Admittedly, the interior of terminal 1, with the escalator tubes, looks cool.
I do prefer it for the Salons AF. CDGVAL also provides a convenient shuttle to cheap hotels. Getting into Paris on the RER kinda sucks.
The greatest risk to your flight is that a strike by ATC, pilots, cabin crew, catering staff, security personnel, border police, ground crew, gate agents, or cleaning staff will cause it to be delayed or cancelled.
Schiphol is a compact, aging building that provides shelter from raptors for the rodents from the surrounding fields, which feature runways scattered over two provinces and oriented in a variety of directions, except NW-SE, which is usually the direction the winds come in. The rail connection is excellent on weekdays, and a crapshoot on weekends.
Since Schiphol operates its own lounge-and-priority system, those run by airlines or contractors are unable to compete. The highly evolved Dutch food service industry (they've even evolved the name: horeca, for HOspitality, REstaurant, CAtering) ensures that the food served meets or exceeds all appropriate standards set by the Dutch penitentiary system.
After the 2022 meltdown, the biggest threat to your flight is when it's windy and only one or two runways are suitable for take off and landing. Additionally, the commute from or to the Polderbaan can make transfers difficult.
​​​​​​