I tried the linked mysqli solution.
It appears to work OK however it seems to introduce quite a bit of additional delay into the page loads when compared against a PHP 5.6 install with the original plugin.
Not sure if this is something specific to my environment as I’m running WordPress in Azure which tends to run somewhat slower anyway.
Really need PHP7 support.
I now have a problem where I need HyperDB for scalability and performance reasons.
And since PHP7 is giving us 30% speed increase I really cannot consider downgrading back to 5.6.
So it’s a catch22….. Either we have php7, and struggle with db performance and scale.
OR we move to 5.6 and struggle with front end performance.