[eric__cartman]

How many of those legacy applications where the source is not available actually need to run natively on a modern kernel?

The only thing I can think of is games, and the Windows binary most likely works better under Wine anyways.

There are many embedded systems like CNC controllers, advertisement displays, etc... that run those old applications, but I seriously doubt anyone would be willing to update the software in those things.

[shmerl]

Yeah, games I'd guess is the most common case or at least one enough people would care about.

[snarfy]

I run a game server running a 32bit binary from 2004. I guess I will not be upgrading in the future.