I have a late 2015 iMac (USB3.1, Thunderbolt 2). I want to buy an external portable SSD to boot it from.
This SSD from crucial is optimally USB3.2, Thunderbolt 3 to run at maximum speeds:
https://uk.crucial.com/gbr/en/ct1000x8ssd9
However since it is no more expensive than a SATA USB 3.1 is there any reason why I should not buy and use it anyway and be ready for when I do have a more modern machine? Will it give me 3.1 speeds?