Re Keysight, a year ago I had a DMM calibrated, they were supposed to email, I would pay the bill, then they would send it back, I was surprised when I got the unit back - I suppose for them I am 'loose change'. 😊
PS re micros - I am in the luddite camp, while I am moderately OCD, getting me to do some programming is the quickest way to get something hit! 10 mins to find a space that shouldn't have been there.