Hey Krista! Thank you for reading! And for customization - I definitely think it's here to stay.
There are companies out there that specialize in tailored services, for instance; legal and accounting services.
There'll always be a market for specialists, and there will always be companies with a lot of money wanting a tailored solution.
But in terms of shifting a freelance business to be self sufficient, and sell-able, I'd personally go the route of building a product :)
Thanks so much again for reading!