So turns out to have been a fairly sound investment. Straight $100 for the SSD. Adapted a sled from the old MacPro 1,1 so no extra hardware.
Quick and easy boot for the rare occasions I need to be in ElCap. Love it for the daily back-ups. Just a quick drag and drop of the individual files. Automatically replaces the previous version. Lightning fast, no waiting for a thumb drive to mount and dismount.
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Social Distancing is an Oxymoron. The correct term is Social Demonization or Social Repression