Fun fact: Instragram comes from Portuguese estragar, "to ruin", "to botch", "to stale".
Well, in 2018, the 2006 MacBook will be 12 years old. 18.04 is an LTS release and will have 5 years of support and security updates. By the time there are no more security patches, the machine will be 17 years old and software exploits will be the least of the user's concerns if it is still his/her main machine.
I have a 2009 32 bit processor Sony Vaio P for which the best option I found so far is Linux Mint, which is based on Kubuntu. The form fator of this model was abandoned long ago, so I have no appropriate alternative in size and weight (no tablet is not good enough). By the time the aforementioned MakBook be 17 years old, my Sony Vaio P will be 14, yet I have to admit that my least concern will be software exploits.
Maternity pay? Now every Tom, Dick and Harry will get pregnant. -- Malcolm Smith