Re: Aikido wrist catching?
Imho you should not aim to "catch" the wrist or sleeve so it doesn't matter if the person is wearing a Judogi or not.
What you are looking for is an intercepting movement where you use tai sabaki to get out of the way of a fast strike, use tegatana to make soft contact and then take a grip at the most opportune point to effect kuzushi for your technique (which is often where the arm is moving the slowest and/or is furthest away from the torso).
Imho the idea of whether it is possible is not a question - if you train muscle memory by using the right drills it becomes just another acquired skill. If you Google Shodokan tanto randori I'm sure you will find video clips around the concept.