I've been calling them "condensation cans" for years. Great profit maker and not proven to do anything. Not a single catch can manufacturer has done any testing to prove the 'marketing'. $5 of aluminum, along with $5 worth of hose clamps.... sell for $70-140.
If you want to R&D your catch can, especially for winter use, wrap it with some coolant hose and splice in after the throttle body, oil cooler, or heater core loop. Should stay plenty warm year round, cook off any water/fuel, and let it catch only the oil.
The GSCaltex IVD paper is an interesting read. Its not definitive but contradicts some common beliefs. There are also a few SAE papers that provide some good info too. As such, I don't use catchcans, don't run extended intervals, and don't use overly low HTHS oil, and don't use conventional oil. Short trips I can't avoid but do spend more than enough time on the highway to heat it all up properly. It takes 20 miles for my oil to fully warm up on cooler days, and 10 miles on a summer day. Driving style and maintenance intervals are worth studying.