I am on a perfectly configured and functioning Ubuntu 14.04 LTS machine.
LTS versions of Ubuntu are supported for 5 years, so in theory there should be no need to upgrade the whole system before the 5 year deadline. I conceive the whole point of having a LTS system the best choice for those like me who prefer to rely on stability for as long as possible, because they develop software or web application for instance: a system upgrade is always a tricky operation.
Considering that I am aware that when 2019 comes Ubuntu 14.04 will not be supported any more, and that I certainly will want at that time to extend the life of my system, I still do not understand what possibilities and options am I left with.
Will in 2019 I be able to upgrade from 14.04 to 18.04 or it is necessary to upgrade gradually, when time comes, from a LTS to the next one? In other words is it necessary now, or in about three months time, to upgrade from 14.04 to 16.04.1 in order to be able to upgrade in 2018 to 18.04?
What is the best and safest choice I can do?