This is what I do. My main watch is the Ultra (absolutely love it) and when either charging or showering I put on the aluminium AW3. It tracks everything all the time. The only time I don’t have a Watch on when I have to do some stuff that may damage the Ultra and I don’t have the AW3 with me with all its scratches. A few weeks ago I needed to paint a wall and the Ultra went off and the AW3 on. I have reasonably high move and stand targets and I am a sucker for getting those rings filled every day.
For those concerned about itching wrists, the Ultra is on my left arm and the AW3 on my right arm. Since I use slow charging (5W), it allows my left wrist to breathe a few hours every couple of days.
Edit: paragraph added.