[ornxka]

"Reality is that which doesn't cease to exist when you stop thinking about it", they say.

Or, to elaborate, these things have a cost whether people are aware of it (and care about it) or not. Maybe it's not so high now, but eventually it's likely to manifest itself, especially when the codebase needs to run in a new environment or be modified to follow a new paradigm. Those situations are where things tend to either "make the jump" and continue to be used or end up in the (already vast) graveyard of abandoned software because the cost of maintaining it became higher than the return it yielded.

[ForHackernews]

The costs are also a benefit to everyone except the users: bloated software makes it easier to sell new hardware. Abandoned software means programmers get jobs writing the new version.