The guys have really done a great job with WooCommerce. Instead of becoming more bloated instead they are slimming it down and improving performance which is always a concern with an online store.

I recently did some load testing of WooCommerce and the results were not what most would imagine. It is extremely fast and light, you can see that here:

https://ops.kickassd.com/woocommerce-2-billion-hits-a-month-0-7-second-load/

Obviously this is a best case scenario and one people start packing it full of plugins, bloated themes etc it will slow down. But a good idea of what it is capable of.

2017 should be a huge year for WooCommerce!