[pierre_massat]

Isn't that much better to know you can update your software and transition to another system every X years ?

Knowing you can update or change your system implies nothing or no one is really indispensable. I would much prefer something like that.

[ctdonath]

"Well, in our country," said Alice, still panting a little, "you'd generally get to somewhere else — if you run very fast for a long time, as we've been doing."

"A slow sort of country!" said the Queen. "Now, here, you see, it takes all the running you can do, to keep in the same place. If you want to get somewhere else, you must run at least twice as fast as that!"

- Alice in Wonderland