[immibis]

If it's a non-commercial affair, you can give them a "written offer valid for at least 3 years" and then you don't have to actually supply it unless someone asks.

In practice, this isn't a very good option to take. Much better to provide it on a "network server" as they were called at the time the license was written.

[worthless-trash]

This sounds like a very sane option to take, id like it to be codified in a license. Eternal availability sounds like a real hassle to maintain.

[immibis]

It is codified...

[worthless-trash]

You're right! thanks for the education.

"b) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by a written offer, valid for at least three years and valid for as long as you offer spare parts or customer support for that product model, to give anyone who possesses the object code either (1) a copy of the Corresponding Source for all the software in the product that is covered by this License, on a durable physical medium customarily used for software interchange, for a price no more than your reasonable cost of physically performing this conveying of source, or (2) access to copy the Corresponding Source from a network server at no charge."