TinkerCAD is great in terms of both function and usability. The core problem with it, being both closed and cloudy, is that it can just disappear one day and le

TinkerCAD is great in terms of both function and usability. The core problem with it, being both closed and cloudy, is that it can just disappear one day and leave you unable to edit anything you made, or losing it entirely if you forget to export it. Unfortunately, many of the "grown up" CAD packages are the same way, with version-specific DRM formats and cloud activation. They're expensive enough that the customers have some power to demand continued availability and access, but the only way to be safe is either to use non-networked local software or software that is open/free enough that it can be hosted by someone else if the vendor or their post-acquisition owner decides to not give a shit about you anymore.