Yes, I think you should wait. There is no immediate benefit to having HW3 and we need to allow the technicians to service cars that have real problems right now. Bringing your car in for service requires the technicians to take time away from more pressing needs, or taking time off to deal with all the family issues that are coming up as a result of the major life changes taking place during this pandemic.
And if they do the upgrade and it creates problems for your car (which has happened to numerous forum members) that will only require more of your time and theirs to troubleshoot. There are more important things to deal with now.
I did mine this past Wed. They called the day before and outlined how to do contactless drop off and pickup. Played out pretty well, and they had sanitizer next to the Check-In kiosk. Certainly can’t claim it was essential for me to do, but dammit, I wanted cones, lights, and stop signs. And with Elon claiming more features later this month, FOMO was too much for me.
I did mine last Friday. They keep a 6' clear distance, no touch. Take some wipes for the restroom and waiting area, and your car when you get it back. Not going to get better in the near future I'm afraid.
I had mine done last Tuesday. There were a few cars there so I think doing your car is hardly taking away from other repairs. And if they couldn’t do it your appointment would’ve been canceled. Entire retrofit took about 2 hours. I’d go ahead with it.