I think a lot of English speakers use commas to emphasize a pause in speech. I don’t think a comma was needed. I think the author was slightly mixing up the rel

I think a lot of English speakers use commas to emphasize a pause in speech. I don’t think a comma was needed. I think the author was slightly mixing up the relative clauses and appositives rules with commas. Source: native speaker, North America EDIT: I like qwertox’s answer best