What? Who is going to pay that bill? For example, Glowforge goes out of business... Google isn't going to continue to host and maintain that software out of the kindness of their hearts.
> but I think the main pro is (like a Tesla) the machine's performance and usability can be improved without you installing any new software.
What does the UI being web-based, and "in the cloud" have to do with it's firmware?
For example, if the UI wasn't hosted on some google server, instead existed within the device accessible via WiFi (like a router) nothing you've said here would be any different... other than the user being able to decide themselves if they _want_ their device updated.