It's not just the UK. To visit family in the UK I would have to get a test 72 hours before departing, then a day 2 test in the UK, then another test 72 hours before returning to the US. That's going to be around $300 per person traveling, and if any come up positive, or the results don't come back in time we could face considerable cost and inconvenience. As far as I am concerned international non-essential travel is simply not viable, and the vaccines have made absolutely no difference to the situation.