The fear of feedback loops is reasonable, but may not be inevitable. The reason complex life exists on this planet, in part, is that the biosphere evolved to prevent runaway climate change. As the life forms grew more varied and complex, the tools for maintaining a viable atmosphere also increased. So the Precambrian extinctions are attributed to changes that extremely primitive life forms couldn’t adapt to. Once life moved onto land, and trees, grasses, and flowers evolved, the number of ways for life to adapt went way up.

It should say something that the most recent mass extinction event (I mean, before the anthropocene), was caused by a giant asteroid and a decade(s?)-long winter, rather than a change in solar luminosity or runaway GHG shift.

With the advent of humans, this planet now has tools available for GHG and solar radiation management (SRM) that were unthinkable by nature. SRM with sulfur dioxide and air capture of CO₂ allow for the rapid reshaping of the climate almost as fast as fossil fuel combustion. As a result, the tools to stabilize the climate are available and their use is inevitable. The longer we wait to use them, the worse the problem gets and the more people are harmed, but given the unheard-of capacities that we’ve developed to stave off runaway global warming, I do not believe that humanity will choose extinction over GHG management and SRM.

Most of these thoughts come from Gaian Bottleneck Theory, which you can read more about here. You may be right, but I’m hoping you are wrong (no offense).

Yeah, FreeCAD is great, but I can only think of one project that I’ve done where SolveSpace absolutely could not work for the geometry I needed and I had to rebuild it in FreeCAD. But that’s just a product of what I am building: simple things like brackets, knobs, and replacement lids mostly. I don’t need chamfers, drafts, lofts, etc. and I get what I need with minimum of time and effort using SolveSpace.

When I do need those features, complex geometries, or modification of pre-built step files, FreeCAD has never failed me.

No one mentioned SolveSpace, so… SolveSpace. Solvespace is a fully functional 3D parametric CAD solver in a free, cross-platform, open-source, portable, single self-contained executable 10 MB file.

I do a fair amount of hobby 3d printing and SolveSpace makes design and CAD stupid easy. The interface is perfectly laid out, the hotkeys are intuitive, and the capabilities make small-scale projects a breeze.

Now, the program has its limitations, but if I just want something quick and simple, there is nothing better.

That was what happened to our data on the “family computer”. My parents were not happy with me that day.

Is this it?