E-commerce is no longer just an "online store" - it is a whole ecosystem in which every decision matters. The choice of platform can determine the comfort of work and the cost of later development. WooCommerce seems great for smaller projects thanks to the flexibility of WordPress, although in my experience this flexibility often also means more configuration work. Shopify gives a ready-made, quick solution with built-in payments, but can sometimes limit the freedom of customization. PrestaShop and Magento, on the other hand, are options for those who need deeper customization - suitable if you really want custom features.
Integrations directly affect the store's agility: secure payments (Stripe, PayU, BLIK) are essential, and connecting the warehouse and couriers automates work and reduces shipping mistakes. CRM helps maintain customer relationships, and analytical tools provide touchpoints for optimization - though of course you need to know how to interpret the data.
Security and performance are not options. SSL, regular updates, backups and loading speed optimization are the bare minimum; responsiveness on mobile devices, on the other hand, is simply a must. I'm also seeing more and more automation, product recommendations or chatbots - they can help considerably, as long as they don't replace common sense and good UX. Technology is supposed to support sales, not complicate it - and that's worth keeping in mind when planning a store.