Your platform against the edge.
Guess who wins.

Import URL rewrites or use an extension, reindex, clear the cache. Often needs a developer and a deploy.

A redirect plugin. It works, but every request goes through PHP and the database.

CSV import of redirects, but only for paths within your own shop and with limits.

Export, Excel, import, and hope the attributes are right. Or an extension per store view.

An SEO plugin per product, or a bulk plugin that puts heavy load on the database.

Per product in the admin, or an app from the store with its own cost per product.

Set up per store view. Difficult as soon as a country runs on a different platform or domain.

With a translation plugin per site. Almost impossible to get right across separate sites.

Works well within Shopify Markets, but not outside it.

Maintenance mode gives everyone a 503. Visitors and Google see an error page.

A maintenance plugin or a short outage during updates.

Shopify handles this itself, so you notice little of it.

Modules and server rules. The attack still reaches your web server.

A security plugin in PHP. It has to start up first before it can block anything.

Well protected by Shopify itself.

This is what Magento is built for. Catalog, stock and checkout belong in your platform.

Exactly what WooCommerce is good at.

Shopify is strong here.

An extension or an external package, plus manual work to adjust prices.

A plugin per site, or someone who compares prices every week.

An app with its own costs, often only for well-known marketplaces.

With Varnish and full-page cache set up well, also fast. Setting that up does take work.

With a good cache plugin (such as Netslim Speed), no problem.

Fast on its own.