As you might know, i’m the Opalstack hosting fanboy. It’s the best shared hosting provider that I’ve ever encountered.
Only problems that Opalstack has had during my experience is that every now and then there have been email delivery problems for email originating from Opalstack servers. That’s the problem with shared hosting plans. Someone does something stupid, whole IP-address is blacklisted and here we go. I hope Opalstack doesn’t have too much work with that.
Earlier, I’ve heavily suggested you to use some 3rd party service for delivering email because it’s not easy anymore. Go and read that article.
That’s the only problem I’ve experienced. I’ve been running WordPress & Woocommerce sites there, my golang driven backends and many more things. Things are easy to set up and even easier to run.