I will give you other Ronaldo as other example. I am from old era, so I better know this Ronaldo.
Golden era of Ronaldo during his career in Inter Milan. One of the best strikers. Golden ball award winner.
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Same Ronaldo (same age as Suarez). Has skills, dont have speed any close to what he had.

What such old but skilled player give to a team? Probably only confidence.
Ronaldo is old in age but he still performs better than the ones who are still in their 20's.
Really? He used to score 50-60 goals per season. Not its only around 20 (in Saudi Pro League...)