Ionic 4 for eCommerce

I want to create a new eCommerce application for my organization. So is it good to use Ionic 4(New released) or should i stick to Ionic 3. Please suggest me the version. I am so confused. Thanks

Ionic 4 is not stable version, but on client request we are working on eCommerce project using Ionic 4 and i am facing many issue like exit app not working, hard to add css styles etc. So from me use Ionic 3 for eCommerce project.

Any ideas when Server Side Rendering will be coming to Ionic 4?