> Polyester is still used extensively but it isn’t the replacement industry wanted This is almost always the case. It's very rare that an improvement is better

> Polyester is still used extensively but it isn’t the replacement industry wanted This is almost always the case. It's very rare that an improvement is better than the original in everything. The new thing is always sold as universally better, and some times it takes a while for the mass consciousness of people to figure out that the new is better in some respects but the old is still better in others.