I want to consolidate my marketing and sales from Nocrm.io and Mailchimp into Nutshell

Right now, I use Nocrm.io for all sales/client stuff and Mailchimp for all my email marketing. Can anyone tell me why I couldn’t ditch these two apps and consolidate all of my sales and marketing activity into Nutshell? My main concern is limitations Nutshell may have compared to Mailchimp.

Thoughts?