I played around with RemoteKernel some time ago (https://taoofmac.com/space/blog/2016/08/10/0830) but this is “better”, although I wish they’d make it hostable in your own cloud provider like materials simulation software and other things we see running in HPC clusters. (I also ran Mathematica in a 512GB/128core VM once for kicks, but it’s just not cost-effective).