Sliding is a recommended way to minimize injury when going down. Going in to a roll will break bones and there is a higher risk of a permanent disability. The choice may be taken away due of the nature of the situation.
Bob I'm am please you think, and i agree, protective gear should be at the uppermost of a riders mind, i do question a statement you posted the other day about not replacing your 15 year old tyres and riding the bike, even if they are short trips, before replacing them. Safety and avoiding a crash starts from the ground up.