If you have an external drive you should be able to time machine it and then you have a path backwards if things to truly sideways.. but I rarely have issues with my development stuff with OS upgrades on Macs, it's usually other stuff like corporate VPN software or attached devices. I used to be the first to update, but nowadays I let other people be the canary.
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Uncertainty is an uncomfortable position.
But certainty is an absurd one.
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