I wish I had 100 upvotes to give you.
I'm currently converting a homegrown multi-million dollar eccommerce platform to Shopify and it's been a dream. Most of the significant lifting was done in less than 2 weeks.
Their graphql api has just been amazing, not to mention all the other developer services they provide.
OFC, I do feel like I'm coding myself out of a job, as I've spent the last 7 years building and maintaining that system.