MLIS worth it with experience?

[Neist]

I'm current a full-time employed library paraprofessional at an academic library, and I've been working for the same library for close to a decade now, in both public and technical services, 9 years of which was management.

I know a lot of people poo-poo MLIS degrees, but given my experience, does anyone think a MLIS would be worth it, considering my significant experience? I study primarily the History of Science, but the University of Oklahoma (where I work) has a dual degree program.

Thanks!