If it only does 70% of what a regular browser does would anyone (seriously not as an experiment) use it on a daily basis? Most people just want to get on the web and go. They don’t care how big their is on disk or how much ram it uses (within reason of course), but the first time it doesn’t render their bank page or Jira page, they will drop it. Obviously I’m not talking about beta testers here or curious web devs.