Generally recalls are only issued where there is a need, and I would always recommend having them done as they are all free of charge.
Things like the Soot Reduction SW can prevent EGR/cooler issues and if you don't have the recall done then any chance of a volvo goodwill contribution in the result of an issue will disappear.
You can use the gov.uk website to check for outstanding recalls on your particular vehicle.
https://www.gov.uk/check-vehicle-recall