Upgraded to php7 with stack but nothing

After adding php7 to my server through ee stack it doesn’t look like any of my sites are using it and they have all been acting just a little “buggy”. All sites look like they are still using php5.6

If i do sudo ee stack status I see php5.6-fpm: Running php7.0-fpm: Running

Do i need to remote php5.6? Do i need to tell all sites to use php7?

Any help would be appreciated.

Have you updated your sites using this command?

ee site update example.com --php7

No, i have not. I figured it was a server wide thing. Will i loose the --w3tc if i dont include that in the update?

No, you don’t have to specify the cache type, php7 is more like an on/off switch