This type of weather has so many threats. I hate de-icing. You're relying on a couple of guys in a truck to tell you that everything is good to go. Every year there's stories of deadheading crews, pax, or FAs in the back calling up and saying there's still contamination on the wings. Some as egregious as the Frontier green slushie incident in BNA. Then you look at the holdover time and the LWE sensor reading on your app, the METAR, and your eyes see 3 different things that generate 3 different holdover times, with guidance from the company that just says "well, it's tricky out there, use your best judgement".
That said when all the airliners are going back, maybe it's time to ask yourself if what you're doing is a good idea.
And it doesn't stop with takeoff either. Yesterday in DTW we were the second aircraft to land after they'd plowed the runway. The county hadn't put out RCCs yet and I had numbers for 3 since that's what they were reporting before plowing. The 737 before us says "braking action is good". We land, all is good. Slowing through 50kts approaching the 1st high speed I got a bad feeling about it and clicked off the autobrakes to go to the next one. As we're taxiing in the plane behind us reports medium to poor braking action on that first high speed.
Actually, more than de-icing, I just hate winter.