Transmission fluid should be changed. It doesn't have to be changed every single year, but definitely something that you should do every so often throughout your ownership to prolong the life of the transmission.
Volvo & other manufacturers claim the transmission's in their vehicles are "sealed" or "sealed for life", yet they have drain plugs...
The fluid can be drained, as there's a drain plug... so "sealed" is a load of rubbish. There isn't an interval as such for changing the fluid, as Volvo (and other companies) don't suggest changing it at all. This is misleading, as servicing your transmission will definitely help it. You wouldn't own a car & never change the engine oil... why they think its okay with the transmission is beyond me.
Make sure you use the correct spec fluid for your car & nothing else. To answer your question...
YES... CHANGE THE FLUID.
