I’ve commuted for 3 yrs now. Ride is about 25 min home to airport. I have Givi luggage on a Ninja 300: 56 liter top case, easylock side bags, and easylock tank bag. I have my rollaboard in my locker, so just transport dirty clothes home and clean clothes back (via plastic grocery bag), plus my briefcase. Trips are typically 6 days long. I have my all-weather gear stored in the side bags. When I get to work I take my clothes and briefcase out of topcase, and then that’s where I store my helmet.
I also have a rack mounted to the top case. That’s where I lash my rolled up bike cover.
All in all it takes me about 5-10 more min dealing with the mc over a car on either end.
Sometimes, if I have a lot to carry into work, I’ll transport the entire topcase to my locker. Givi makes a “trolley” for the topcase which makes it like a rollaboard.
Also I use electric gloves and vest for winter. I find it effective down to 20 deg or so. Bout the only thing I’ll decline to deal with is frozen precip on the roads.