What makes this the holy Grail? Is it even developed anymore? Last 'nightly' was three months ago. It looks like a pretty standard webview to me. If you do use a webview you need to keep Android System Webview updated, that's where the security patches are.
Off the top of my head, and in no particular order, there is Fulgaris Privacy Browser Smart Cookie Web Monocles JQuarks Probably a bunch more, tons of webview browsers out there