Choosing a CMS/frame for an online store?

Question

CMS

Good afternoon.
Probably a trivial question, but so far I have not found an answer. I will describe in more detail who can tell me
There is an online store for computers on the opencart 2.1 engine. This year, it is planned to redesign, increase the functionality, add goods by connecting the API, connecting payment systems and deliveries on the territory of the Russian Federation
. ~ 50,000-70,000 items are planned for goods (the API of which dealers will be connected is still being specified), but now there are about 5,000 items on the site. The PC configurator also works, with a real-time compatibility check written by hand (but I know there are some ready-made options https://marketplace.1c-bitrix.ru/solutions/webpros... , they didn’t find one on opencart)
The exchange now takes place from 1s - receiving orders, transferring data about the product
. It is planned to connect a bonus system with points, wholesale prices for different categories of people, check the status of the order (exchange from 1s) check the phone number during the first purchase (by sending SMS to the specified number), Authorization is also via SMS. A good search by name and description, most likely a sphinx. Unloading from 1s, in addition to orders, it is planned to transfer order statuses, all information about the product, separately warranty statuses, etc. An option is planned for ready-made PC products - displaying directly in categories - fps in games, and sorting by this topic (this does not apply to the filter), uploading to marketplaces .... and many such options and extras. Well, the design is fresh "light". Good SEO support, security

The question is still standing, does it make sense to stay on opencart, will it pull out such a load, or does it make sense to take Bitrix (the question of the cost of a license suits), or get confused on a frame. it is clear that almost all of this will be written by hand (including the design. It is individual and without templates)

Answer 1

My five cents: in this case - Bitrix.
Naturally, the cost of a license will be a drop in the ocean of upcoming expenses, but for a store with 50 tons of goods, the same expenses in the region of $ 500-1000 per month for technical support are usually nothing. The framework will get more expensive (you will need to hire a full-time programmer), and for Opencart, IMHO, there is simply no experienced office to implement all the Wishlist.

Answer 2

Will he take that load?

It's not a burden - it's dust
You are used to working in/with open-crate
Why change your habits It
's no problem to hire experienced performers with normal technical requirements,

Good SEO support

And what does opencart have to do with it :)
And what is a good one?

security

"And you don't steal" - either order solutions, or buy on official sites

The PC configurator also works, with a real-time compatibility check written by hand

It is not entirely clear, if there is, then what is it worth introducing it into the opencart logic?