the much harder work.

It's hard work to create a system that works. It takes effort and time, blood, sweat, and tears. 

The much much harder work is to then demolish that system for one that might be better in the next 5 years. Waste all that work? Waste all that effort and time, blood and sweat and tears for more work and effort and blood and sweat and tears? 

But, it's working. 

For now. 

Ask Blockbuster how long it will keep working though.