Is it worth using a ready-made CMS for the specific tasks of an online store?

Question

CMS

Hello! The problem is the following:
You need to make an online store, but you also need the ability to add additional items to the order at the customer's choice and send information about these items to another service, possibly several.
I studied ready-made CMS - OpenCart, PrestaShop, but I'm still worried about the situation if in the future it will be necessary to add some very specific functionality (for example, interaction through social networks, a blog, whatever) - how difficult it will be to implement, and whether it will be necessary later still write your own solution? And our decision is already the transfer of all the functionality we have added and all the data about customers and orders, it hurts.
In general, please tell me the best way.

Answer 1

Read Lean Startup. Make the store as soon as possible and with as little functionality as possible. The platform doesn't really matter. Trust me, I've been comparing/choosing CMS for so long that I almost got burned out. I described my experience here (in English).

Answer 2

"Anything" is a loose concept. You can now implement what you need using cms in a couple of weeks, or you can spend six months writing the same store functionality from scratch on the framework, so that later it turns out that you don’t need to implement “anything” because the store didn’t go / gave another performer / the existing functionality is enough. Or even worse - the architecture you developed from scratch is unable to support the functionality that will need to be implemented in 5 years, or maybe the chosen framework is outdated and it's still easier to rewrite the store from scratch. Think with specific tasks in the present tense (and in the near future, with the fact that 100% of you will be asked for, for example, a year), but under "anything" you will never guess and there will always be a chance that you will have to write a lot and from scratch.