Not always, but...

If you are reviewing your own stuff and your mind wanders, maybe that paragraph should come out.

It's still not easy for me to do that.

I do it, I use run-on sentences.

The intent is to convey. Sometimes you want to take half an idea and get it going, and then fire off its rockets and send it into the sky.

The run-on sentence is a tool to be used, like any other. But you have to use it with care, so that the reader knows you know the difference, and knows that you're not just plain illiterate.

You might even want to point it out explicitly.

Showing "that"

Before: I picked up on that theme and tried to show that our reliance on credit increased...

After: I picked up on that theme and tried to show our reliance on credit increasing...

"That" is a word I type while waiting for my mind to come up with the words I want. Often I go back and get rid of it, later.

In this case, I want to show "the reliance on credit". I don't want to show "that".