I've been flopping around the internet looking for better #WordPress hosting, but it hasn't gone well so far.
@kev So if you write your own theme, you could switch to Craft CMS and use the hosting you have.
It in has built in caching and plugins (paid) to handle the other items (not super sure about the newsletter glue).
Plus you have absolute control over the front end and final rendered output. It's pretty damn fast.
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.