We currently support PHP versions starting from 5.6 up to 7.2.
Yes, we fully support PHP 7.2 – you can check the full article about PHP 7.X here:
PHP: 5.6 to 7.2
More recent versions of these have not yet proven their stability in a dynamic hosting environment to our satisfaction.
See which WP host destroyed the competition on speed ( read the independent test by Matthew Woodward here).