Tech is a moving target, but it can endure as it fades and is superseded, as long as you float along jumping to a new log as the other one gets water logged and sinks below you - the new stacks you speak of. As long as you are content with the progression and are happy with what you earn(assuming it inflates accordingly), you are a success in what you do! Though I have seen too many people choose the wrong log = sinks with all hands, so survey your field and stay afloat.
