Changing scripts in the future...

I've been a member of many other sites and over the years for whatever reason they found the need to change scripts for their sites and had to migrate all the members data over to the new script.

So, out of curiosity, how difficult would that process be to change from Dolphin to another script sometime in the future? I'm not saying it a forgone conclusion but having the option to do so without too much hardship would be nice.

Or put another way... If we're running a site with another script and want to switch over to Dolphin etc.

This is probably more of a discussion on the viability of preparing for such a future need than it is "HOW" to do this. As much as we like to think things are permanent or lifetime, in fact they're not. Life happens, things change, another script might come along and be a better fit etc. I think it's something to think about and have some idea of a plan of attack so to speak in case the need arises for whatever reason.

Once we have a fully running site with members, are we married to whatever script we choose?

just thinking out loud...