Ask HN: What would you pay $100/month+ for, if it existed?

Software, hardware, service, etc. Ideally something that could plausibly be built within the next ten years, but don't consider that a binding constraint. If you would recommend that your company pay $100+, that also counts. Some acceptable/plausible answers ten years ago: high-speed mobile internet, Uber, lots of SaaS companies. Feel free to add answers that exist now, didn't exist ten years ago, and which you would pay $100+ for now (even if it's free or cheaper in reality).