I'll agree that the half-life of things we're building sometimes seem rather short. Two systems I worked on that had over 500k users each, have both been switc

I'll agree that the half-life of things we're building sometimes seem rather short. Two systems I worked on that had over 500k users each, have both been switched off and are not longer 'alive' on the interwebs. One for internal political reasons, the other was absorbed into the main portal for the parent company. (Some of my code still runs internally, but the public-facing stuff is drastically different) And my other web-apps were internal/intranet web-applications. That said, they're still running and useful - even 12-15 years on... so it's not all bad. But the public web (particularly e-commerce related sites) seem to have short lives these days. Perhaps Open source might be your better bet if you want to leave some sort of legacy.