I have to say that I've grown with Wix over the years & we have a weird relationship.
It is also super important to not put your eggs all in a social media basket.
Shit can change in an instant out there.
Think about things like the Vines people who lost their influence with a quickness.
Algorithm mastery one day and complete cricket silence the next!
You definitely want to build up a following where you can. And best you can but a home base is always a smart investment and luckily Websites are really not that expensive.
I think at end of all it depends your goals too like wix is good to me and for me like I have a weird ass love and hate with them but more often love lol