Should I upgrade to ionic 4?

Yesterday I got a warning to update my apps to ionic 4

So, Should I upgrade to ionic 4 without facing any problem in my apps ?

Or Its not recommended for the older version of apps ?

To be clear the warning is probably not about upgrading Ionic v4 but upgrading the Ionic CLI v4

As far as I understand, I personally just tested “ionic serve” after the update, it’s safe to upgrade the CLI and be still able to work normally with your Ionic v3 app

If you just want to give a try first, you could have a look at my answer on stackoverflow, it’s a quick way of just trying the new cli without modifying your global one