php 7 compatibility

Assuming you went ahead and upgraded to php 7, have you had any problems?

I upgraded to php 7,and till now(2 and half months)everything is ok.

I am unable stop WP Super Cache caching the sitemap_index.xml since upgrading to PHP 7.0
WP Super Cache ignores requests to “not” cache xml files.
This is what I have in the strings bit:
wp-.*\.php
index\.php
*\.xml

But this is how the sitemap looks :
https://frodsham.gov.uk/sitemap_index.xml

If I disable caching everything is fine.