If Knoppix becomes Debian when Installed to a HDD ...

Does that mean Knoppix becomes a rolling edition that has no need to be renewed every 6 months?

In other words, will constant updates provide the same results without reinstalling a new version of Knoppix?

Do no basic differences between Knoppix and Debian then? And if differences do exist, what are they?

And does it mean that support will not be available from this forum once Knoppix is installed?

Or just that additional support can be obtained by subscribing to Debian Forums also?

I ask because I am currently using LMDE (Linux Mint Debian Edition) on a desktop computer and have been unable to update it for a while, but have gotten no support in spite of having posted to the LMDE Forum, so I'm considering Knoppix as an alternative, particularly if the response to this post is positive.

Thanks in advance for your responses.