All of this. Musto now has the warranty on their site for 2 years only. Once those two years expire, they state, Gore picks up the warranty with their "Guaranteed to Keep you Dry" policy. So even if it isn't the fabric after 2 years, and actual construction starts failing, there is nothing which will cover you. No one, should expect to replace a $775 MPX Race Jacket every 2 years, that is insane. Musto previously, and other companies used to say for the life of the garment, While that ambiguity left it open for interpretation, most people think a item of these prices, should last considerably longer than 5 years, yet alone the 2 they offer now. If it is a design defect that shows up later, it is not their problem any longer. That seems to be an issue in the OP. They certainly did change the zippers over the model years, maybe that doesn't happen unless their is a problem, but us customers will never know.
For my own sake, I decided to look into this further in case anything in the future arises. Below is what happens when you contact Gore. Which, even at first look, feels like you are getting the run around. Who has an initial receipt these days? Furthermore, if you look into the fine print on their website, they will only cover your costs to your purchase price via a credit to the manufacturer. While sure, that is 100% of what you paid and semi-reasonable, every year these products are going up in price. That $400 item you bought is now, $600. For a something that should not have failed, you still would be on the hook for $200. Even if Musto were to offer you cost on a new one, that still is a lot of money for people. I don't see this changing, but it certainly would be nice to have a company stand by their product and customer base, without always looking at the bottom line, profit.
Thank you for contacting GORE-TEX Brand Services. Please provide us with some additional information so that we can handle your case with the highest level of efficiency and accuracy. Before we take a look at your item, we will need to establish some initial information to determine the item’s overall condition. This is important because the item to be returned must have useful life left and not be excessively damaged or worn-out.
Please answer the questions below to the best of your ability:
Style or model name?
GORE-TEX technology, if known? (This information can often be found on the sleeve or tag.)
Size of the item?
Where did you purchase the item?
What year did you purchase the product/s?
What was the price you paid including tax?
Please attach a copy of your initial receipt.
How have you cared for the item? (Washing, care instructions, etc.)
Is the item damaged? (tears, punctures, heavy abrasion etc.) If so please explain.
Where is the specific location/s you are experiencing the leak/ delamination?
Please describe the conditions or activity in which you experienced the leak or noticed the delamination.
Please attach pictures of the item’s current condition (front, back, and inside), the area/s of leakage, any damaged areas, tread on the soles (for footwear), our GORE-TEX tag, and the manufacturer's tag.
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