I'm in AB and work at a Windows/MS-based shop, and haven't run into any real problems with any Windows/Apple/Linux systems with the time change.

Our IT department ran a couple scripts last week and everything this week has been smooth sailing.

Things I have run into problems with have been my smart thermostat (ecobee, now fixed), my Philips Hue lights (most of my automations are via Home Assistant, but I have a handful that rely on colour temp in the Hue app), and my Ford car. (Auto time zone and auto time aren't separately configurable, and auto time zone puts me in the wrong time zone.)