As someone who is not that tech savvy and uses WP mostly just to publish blog posts while others do the magic behind the scenes, I must say it is very often laggy, especially if I compare it to my private blog that runs on Wix. Then again, I’m sure Wix does not feature so many customization options, but in all honesty if you just need a sink for your writing you don’t need a lot of fancy stuff on the page.