I mean, last winter overall still ended up above average temp-wise for Texas.
DFW averages 2" of snow per year, and it's perfectly normal for it to get brief cold snaps and intermittent snow/ice events. In total, DFW got about 1.8" of sleet last year, right in line with climo.
Feb '21 was indeed highly unusual, especially with respect to coverage/duration and the fact that ERCOT's capacity is under even more strain these days because of the explosive population growth, but even it wasn't entirely unprecedented (see 2011 and 1983).
As far as Summers, 2019-2021 were fairly pedestrian by Texas standards, if not a bit on the cool side. And don't forget, the hottest Summer of all was way back in 1980. With respect to this Summer, it's too early to judge how it will playout. Although with the Canadian wildfires having similar cooling effects in the atmosphere as the big Volcano eruption did in 1992 across the NE US and the burgeoning El Nino amplifying the STJ, any ridging and potential heatwaves going forward are looking a lot messier, especially for North Texas (see the way the pattern played out through mid-June for example).
But my overall point is there isn't enough hard statistical evidence to suggest the weather patterns are becoming any more wonky for us than usual, other than the frequency of tornado outbreaks having taken a huge nose dive (which is a good thing).
