How to write imageboard

Hello,
I found out that kusaba x is pretty old shit. What's this whole think about generating html files? Can't it be done simply by sql queries every time and do it with some ajax? How would you write it?

1. Write an application that waits for new ``update-the-HTML-pages'' requests and executes them until they are nonexistent. Limit the request queue according to the available memory

2. Write a (layered) (compiled) application that does all the post validation mumbojumbo, persists the data and then invokes application #1

3. Write some JavaScript to lazyload the images in each board page

4. Serve the files generated by application #1 in a lighttpd server

5. Serve application #2 in an Apache server

6. ???

7. Cheap, fast 4chons

What's the problem with this approach?