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It's not suede it's microfiber. I own some 10 year old microfiber covered sofas and they have held up extremely well. I don't think you need to do anything to them but that's up to you. It's amazing how well shredded soda bottles hold up.
Automotive grade microfiber, if they actually used it which I do not doubt, is far more durable than the regular microfibers mostly because of the backing. I had it in my last fun car, and even after going looking for arrowheads a couple times in the vicinity of the racetrack I would just hit them with the vacuum then wipe them with a rag and they still looked brand new after 4 years.