Same. Work hosts a bunch of client sites on WPEngine. We only ever had one problematic client who uploaded a heap of high bandwidth video and blew out their disk and bandwidth allocations by over 10x - WPEngine didn't cut them off, and worked with us/them to move their large media assets off the WP install (for reasons, the client went with AWS S3/CloudFront).
We know WPE aren't the cheapest way to host WP, but if a client argues about the difference between a $5/month GoDaddy hosting plan and the $20/month starter plan on WPE - that's a pretty good indicator that they're not a right fit client for us. We have a few smaller agencies we'll hand them over to who are a better fit for them.
If you ported an already working app then you missed out on the unmitigated disaster of Atlas Content Modeler, which was advertised as production ready but slowly became abandonware without them ever really acknowledging it. I hope you never need to consume your content via GraphQL, because they absolutely can't handle it at reasonable traffic loads.
I've never had a lick of trouble, and even though I'm pretty proficient at hosting LAMP apps, it's much less effort than self-hosting.