... yep, while you can boot off an external disc, it's something you'd usually do temporarily, e.g. for recovery, not long term, unless you had no option.
And even then it's susceptible to accidental unplugging, SATA-USB adaptors/enclosures aren't always that good at their job, and if either Mac or adaptor are limited to USB 2 rather than USB 3, you are really limiting the SSD performance.
... yep, while you can boot off an external disc, it's something you'd usually do temporarily, e.g. for recovery, not long term, unless you had no option.
And even then it's susceptible to accidental unplugging, SATA-USB adaptors/enclosures aren't always that good at their job, and if either Mac or adaptor are limited to USB 2 rather than USB 3, you are really limiting the SSD performance.