security by obscurity.
running an outdated, vulnrability-ridden software just because it is "bigger and slower" ? and on a live, production ecommerce site that is processing people's money?
god, just please - don't.
elementor adds a lot of overhead, that's for sure. but you're running an ecommerce site... ramp up the resources, get a decent host, and most of all - optimize optimize optimize. everything from server-side to client-side and frontend.
in ecommerce, every 500ms of page load affects conversion rates, and consequently - your revenue.
on a personal note, I would just buy the plugin for production use over an ecommerce website.
this business is unforgiving to those who cheap out on their bread and butter.