Can the theme be changed?

Question

Search Engine Optimization

Hello, I want to make an information site, I have another site on a different topic, that if you remake the old site for information, completely erase the old one and make a new one on a different engine, with the same domain and hosting, this is not something to worry about from an SEO point of view What do you suggest in general?

Answer 1

You will first lose all the traffic that was on the old site.

Answer 2

From the point of view of only minuses and boost, there will be no first, so it’s better not to do this

Answer 3

If the topics differ dramatically, then you will lose traffic, positions, and attitude from the PS. If the topics are similar, then you can periodically cut out old articles, but not quickly.
Although the best thing, from my point of view, is to look for some drop domains on your topic that you want to start promoting, and deploy a new site on the domain found (I did that)