The maximum transmission unit (MTU) of an IPv6 link defines the maximum size of a single data packet that can traverse the link.

The maximum MTU for an IPv6 Link is 1280 bytes or 1350 bytes depending on which source you look at, but no matter where you find it - it’s also the size that every standard Ethernet port supports.

And if we're honest here there isn't really any reason to increase that number beyond whats already possible today with modern TCP stacks.

It would require us to redesign almost every network device out there and introduce new hardware into the market at great cost and effort.

So as far as I see it there doesn't seem much benefit to increasing this value above 1280/1350 Bytes and therefore it most likely will stay that way going forward.
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