I too am planning on leaving at least a few of my Neandersim lots, and moving everyone into new houses when I eventually get to the next era. I might convert one or two into community lots as "Historical Sites" later on in the challenge, I'm not quite sure right now. And if I delete a few too many, I have the lot saved into my lots bin so I can easily plop a new one down when needed. ~VP
I'll stop being anti-social when the rest of the world quits being idiots!