Are pillar pages still an effective strategy?

I recently took over our marketing efforts at a small business and don't have a ton of experience in SEO. Prior to me taking over the team we outsourced a lot of content creation via blog with some success for a company of our size. I'm looking into creating pillar pages seeing as we have a ton of existing material to link to - is this still seen as an effective strategy or would I be better off writing a bunch more blogs?