I'm wondering what adjectives you hope to apply to a phone operating system. I'm content with mine when I don't have to think about it, for which "acceptable" seems about right, and discontent when I do.
Well, you put a lot of trust in the individuals in this case.
A disgruntled employee can just let the bad guys in on purpose, saying "Yes they belong here".
That works until they run into a second person. In a big corp where people don't recognize each other you can also let the bad guys in, and once they're in nobody thinks twice about it.
Voxel engines are interesting because they're very much an area of active research. People are often coming up with novel techniques, and adapting traditional techniques in interesting ways. There isn't any good, singular resource for learning about voxel engine development thay I know of.
I'd recommend Handmade Hero for a more traditional resource on how to build a game engine. That's how I learned to program for real, and it worked great for me.
I self host on an NAS at home with a free Cloudfront CDN on top; it's really easy to do and for simple websites (including dynamic ones backed by an sqlite db) that don't receive excessive traffic, it works well and is almost free (since the NAS would be on in any case).
Of course it wouldn't work for all cases but I find it beats having a vps somewhere that can be taken down for no reason at all.
This is like saying "I got kicked off a plane so I bought a Civic and bolted a wing on the back". Cloud front is doing all the heavy lifting and you're not really getting data center level reliability.
Well, I think it won't