Butterfly Zyre 03 longevity?

[An0n]

Played with my Zyre since October last year (estimate an average of like 4h of playtime per week so not too much), topsheet still in great condition, edges recently started crumbling though but still okay to play. By far the most durable rubber I have ever played with, still plays very close to a new one.

 

[Federal_Agent]

I have a FZD ALC with zyre03 [forehand] and tenergy19 [backhand]. I have been using these rubbers for the past 6 months, for about 10 hours a week, and I have noticed that the performance of the zyre03 has decreased by 10% to 15%, with a difference only in spin generation, meaning it is still excellent in terms of power and speed.
There is visible degradation in the contact area, as shown in the photo.
Very expensive rubber but the cost vs. benefit is high.