I didn't explain what skill decay was, I just mention that they might implement it. He already knew and hated skill decay.
And I imagine skill decay in the light that A, you will lose points in skills as you play. B, you will lose points in skills as you train other skills. In either light I am fully 100% against it, even if its light. I don't need to hear what they have planned or what kind of skill decay they intend to use. Its like saying "How can you say you don't want to a bone broken, when you don't even know what bone they will break or how bad the break will be?"
A soft skill cap can accomplish this alone without skill decay. If you make it so after 500 points it takes twice as long to level. At 1000 points, four times a long. At 1500 eight times as long etc. And there is say, 5000 skill points total with another 100 being added every month or so, then you WILL have to make choices. By the time you get to 2500 points it will take you 64 times as long per skill point to level something. If you are still managing to push levels at that point you just flat out deserve them. I know for me, at that point, I will stop caring about leveling. And you would have be a grinding machine just to get to that level.
That sets the bar at max in all skills? Sorry but thats just unrealistic. By the time you reached 5000 points you would have been grinding the last 500 points at 1/1024th the normal rate. I don't care if every skill raises as fast as terraforming, that is impossible to max.
I would support a form of VOLUNTARY skill decay where you could choose a skill and select decay, then train another skill at a normal rate but losing points from that skill on a 1:1 basis (So you are training at the normal speed but your skill total is not rising). But I never want to have to re-do leveling, and I don't want to feel like I can't try another craft out or perform some low level actions in a craft without destroying the work In the craft I care about, and I certainly do not want to feel like I am nerfing my character by not constantly doing things which generate skill points.
Skill decay is an obsolete, and quite frankly crap idea only favored by uber grinders that can be entirely replaced by a well done soft cap. When you get a well done soft cap the difference between someone who plays a decent amount and a no-lifer will be 1-3 maxed skills.